Best Hot Springs Near Iguazu Falls
The thundering roar of Iguazu Falls—spanning the border between Argentina and Brazil—is one of the most powerful displays of raw nature on the planet. The raw power is both energizing and scary at the same time.
What I was surprised to learn is that the Iguazu region sits atop the Guarani Aquifer, one of the largest underground freshwater reservoirs in the world. This geological wonder provides a seemingly endless supply of mineral-rich, naturally heated water that surfaces in a series of world-class thermal resorts and hidden jungle retreats.
If you have the time, we highly recommend a road trip starting at Iguazu Falls and heading south along Route 14 in Argentina. You can hit Termas de la Selva in Oberá on day one, continue to Chajarí and Federación, and cross into Uruguay to visit Salto Grande. It is one of the most concentrated "hot spring journeys" available anywhere in the world.
While Iguazu is a year-round destination, the hot springs are most enjoyable during the Austral Winter (June to August).
The water from the Guarani Aquifer is famously high in bicarbonates, sodium, and calcium. While excellent for the skin, it can be dehydrating. Always drink twice the amount of fresh water as you would during a normal day.
1. Mabu Thermas Grand Resort
While technically a resort, Mabu Thermas Grand Resort is the premier destination for thermal enthusiasts who want to stay as close to the falls as possible. The resort sits directly atop the Guarani Aquifer, and its complex of pools is fed by naturally heated water that emerges at a consistent 97 degrees Fahrenheit.
The resort is located 12 km away from the Iguaçu Falls, one of the New Seven Natural Wonders of the World, and from the International Airport of Foz do Iguaçu.
It is the first resort in Brazil to attain sustainability certification, in compliance with the NBR 15401 standard of the Brazilian Association of Technical Standards (ABNT).
The water is renewed every 4 hours and crystal clear water comes bubbling up through the ground to feed the pools and beach at the resort. I love that they created a beach to enjoy while at the pool and spas.
Note this is a very family friendly resort. Even during low season the hotel is 80% families with small children. They even offer babysitting services so this must be a haven for parents. You will need your white noise machine!
As an added attraction, the famous characters from the Brazilian children’s story Sitio do Picapau Amarelo, by Monteiro Lobato, and the entire recreation team put on a show for guests of all ages, with daily performances from 8:30 am to 10:30pm.
Water Quality: ★★★★★ – 5 stars: Crystal clear, naturally filtered, and free of any unpleasant odors or contaminants. The resort takes great pride in the purity of the aquifer water.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage. It is located on the main road between Foz do Iguaçu and the National Park.
Ability to be Alone: ★★☆☆☆ – 2 stars: Busy atmosphere, shared pools with limited privacy. This is a popular family destination; solitude is rare here.
Water Temperature: ★★★★☆ – 4 stars: Comfortable soaking temperature with room for slight adjustment between the various shallow and deep basins.
Health Benefits: ★★★★☆ – 4 stars: Noticeable mineral presence with potential health advantages, specifically for skin hydration and muscle relaxation.
Nearby Amenities: ★★★★★ – 5 stars: Spa services, restaurants, lodging options, and recreational activities within walking distance.
2. Blue Park Foz
Blue Park is home to the third-largest thermal beach in the world. It’s an expansive water park that uses 100% thermal water from the Guarani Aquifer, offering a "beach" experience in the middle of the jungle.
It’s a sprawling water park that doesn’t just stop at slides and pools – though it has plenty of those – it’s also home to a massive wave pool, a sandy “beach” area that makes you forget you’re nowhere near the ocean, and naturally warm thermal baths that feel like a hug from the inside out.
Water Quality: ★★★★☆ – 4 stars: Minor sediment or slight sulfur smell, but still clean and enjoyable. With high volume, you occasionally notice the minerals more prominently.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage.
Ability to be Alone: ★☆☆☆☆ – 1 star: Overcrowded, noisy environment with little opportunity for quiet soaking.
Water Temperature: ★★★★☆ – 4 stars: Comfortable soaking temperature with room for slight adjustment; the "ocean" waves are surprisingly warm.
Health Benefits: ★★★☆☆ – 3 stars: Moderate mineral content, may offer general relaxation benefits.
Nearby Amenities: ★★★★★ – 5 stars: Spa services, restaurants, lodging options, and recreational activities within walking distance.
3. Termas de la Selva
Located about 3 hours south of Puerto Iguazú, this is arguably the most "natural" feeling thermal experience in the Misiones Province. Surrounded by native trees and red earth, these pools are fed by a deep well into the aquifer.
Stay nearby in Obera at Cabañas Mauer and enjoy the lush gardens from your own cute stone cabana and kitchen.
There are three pools with different temperatures, the warmest around 45 degrees Celsius. Pool 1 = 27 degrees Celsius (81 degrees Fahrenheit) Pool 2 = 34 degrees Celsius (93 degrees Fahrenheit) Pool 3 = 45 degrees Celsius (113 degrees Fahrenheit).
There are chairs and tables, bathrooms with showers, and you can order food and drinks. Bathrobes can be rented at a low cost. The pools are half a meter deep, ideal for children and for relaxing.
There are some tiny trails into the nearby forest that are nice to have an relaxing walk as well.
While in Obera enjoy the Parque de las Naciones where there are buildings celebrating German, Arabian, Brazilian, Spanish, French, Italian, Japanese, Nordic (Danish, Finnish, Icelandic, Norwegian and Swedish), Paraguayan, Polish, Russian, Swiss and Ukrainian.
I personally loved Obera’s Garden of the birds, where there are more than 200 species of birds. It’s abeautiful place to enjoy nature and only a couple of dollars, but as of 2026 there are very few birds left.
Water Quality: ★★★★★ – 5 stars: Crystal clear, naturally filtered, and free of any unpleasant odors or contaminants.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage right off Route 14.
Ability to be Alone: ★★★☆☆ – 3 stars: Moderate crowds, but space to find some solitude, especially on weekday mornings.
Water Temperature: ★★★★★ – 5 stars: Multiple pools with varying temperatures to suit individual preferences, ranging from $32^\circ\text{C}$ to $42^\circ\text{C}$.
Health Benefits: ★★★★★ – 5 stars: Rich mineral content with documented therapeutic benefits for specific conditions like rheumatism and skin ailments.
Nearby Amenities: ★★★☆☆ – 3 stars: Limited amenities, requiring some effort to find necessities. There is a small buffet and basic changing rooms, but no luxury hotel on-site.
4. Itaipulandia Thermal Resort
On more than 26 hectares of rural property, this lively resort with a water park is 60 km from Iguaçu National Park.
A 90-minute drive north of the Falls takes you to Itaipulandia. This massive complex includes a thermal spa and water park.
The water park features waterslides, wave pools, a lazy river and a children's playground, plus snack bars, and pools with geothermal water.
The aquifer has a flow rate of 100,000 liters / hour with thermal water at 42 ° C, with excellent qualities extremely beneficial minerals health.
Stay along the Parana River at Pousada Don Blu. For a fee, there is a kitchen for cooking meals. Or have an excellent breakfast with fruit, cakes, coffee, chocolate, and bread. It’s within walking distance of the beach along the river with clean bathrooms, wifi, and shade.
Water Quality: ★★★★☆ – 4 stars: Minor sediment or slight sulfur smell, but still clean and enjoyable.
Ease of Access: ★★★★☆ – 4 stars: Requires a short hike or walk on well-maintained paths from the distant parking areas.
Ability to be Alone: ★☆☆☆☆ – 1 star: Overcrowded, noisy environment with little opportunity for quiet soaking.
Water Temperature: ★★★★★ – 5 stars: Multiple pools with varying temperatures to suit individual preferences.
Health Benefits: ★★★★☆ – 4 stars: Noticeable mineral presence with potential health advantages.
Nearby Amenities: ★★★★★ – 5 stars: Spa services, restaurants, lodging options, and recreational activities within walking distance.
5. Termas de Chajarí
For those willing to venture further into the "Thermal Corridor" of Argentina (about 6 hours from Iguazu), Chajarí offers a more rustic and peaceful environment. This is a "Thermal Village" rather than just a park.
Founded in 1872, Chajarí grew up next to the Argentine Eastern Railway. Chajarí is a zoogeographic place name of Guaraní origin that means stream or water of the Chajá (Ave: Chauna Torquata).
There are 12 pools ranging in temperature from 28-39 celcius and depths from two to six feet. They have everything from pools for kids, accessible pools, to hydromassages and waterfalls.
Stay within walking distance at Resort Termal Chajarí with a kitchen, sauna and hot tub.
Water Quality: ★★★★★ – 5 stars: Crystal clear, naturally filtered, and free of any unpleasant odors or contaminants.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage.
Ability to be Alone: ★★★★☆ – 4 stars: Larger pools with designated quiet zones or secluded areas available.
Water Temperature: ★★★★☆ – 4 stars: Comfortable soaking temperature with room for slight adjustment.
Health Benefits: ★★★★★ – 5 stars: Rich mineral content with documented therapeutic benefits for specific conditions.
Nearby Amenities: ★★★★☆ – 4 stars: Some amenities available nearby, requiring short travel to the main town for fine dining.
Webpage:Termas de Chajarí
6. Termas de Federación
Federación is the legendary "thermal capital" of the region. It was the first site to tap into the Guarani Aquifer in the 1990s. While a bit of a trek from the falls, it is the gold standard for hot spring enthusiasts in South America.
The park includes a large lakeside hot spring aquatic park with a balmy giant lazy river & various pools, bars & cafés.
There are different pools between 20 and 41 degrees Celsius.
You can carry your own beach chair or rent one. You can bring your own food & drinks (except alcohol not allowed) or eat at the restaurant. All pools are free access.
Water Quality: ★★★★★ – 5 stars: Crystal clear, naturally filtered, and free of any unpleasant odors or contaminants.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage.
Ability to be Alone: ★★☆☆☆ – 2 stars: Busy atmosphere, shared pools with limited privacy.
Water Temperature: ★★★★★ – 5 stars: Multiple pools with varying temperatures to suit individual preferences.
Health Benefits: ★★★★★ – 5 stars: Rich mineral content with documented therapeutic benefits for specific conditions.
Nearby Amenities: ★★★★★ – 5 stars: Spa services, restaurants, lodging options, and recreational activities within walking distance.
Webpage:Termas de Federación
7. Termas de Presidencia Roque Sáenz Peña
In the heart of the province of Chaco, in the city of Presidencia Roque Sáenz Peña, is this thermal complex, small but very well maintained and with a modern infrastructure.
Deep in the Chaco region, several hours west of Iguazu, these thermal baths are famous for their medicinal properties. It is less of a "water park" and more of a clinical health spa.
Stay nearby in a cute wooden casita - Casa Quinta con Pileta. Enjoy the quiet of your own place with kitchen and private pool.
The thermal complex has 20 individual boxes for immersion bath, a swimming pool with thermal water and another heated interior, two sauna bath cabins and two Turkish bath cabins.
The waters of Sáenz Peña are rich in minerals such as iron, chloride, bicarbonates, calcium, and magnesium.
The hot springs of the Mula Baths are especially suitable for general relaxation, all kinds of diseases of the bones, the skin and for some kidney treatments.
The float tank is full with 600 liters of water and 350 kilos of Epsom salts causing the same sensation as bathing in the Dead Sea, providing a deep state of relaxation both physical and mental.
In addition, the facilities have the Hall of Tea Las Termas, where you can enjoy a completely handmade menu of drinks and natural foods, fresh and healthy.
In addition to the thermal complex, the city offers multiple cultural and natural options. The city has a Municipal Ecological Complex: more than 2000 rescued animals, including yaguaretés, tapirs, condors and peacocks.
Visit the Field of Heaven a major site of a meteorite fall, with the "Chaco", one of the largest in the world. There are more than 25 craters in an area of 11 by 2 miles.
Water Quality: ★★★★☆ – 4 stars: Minor sediment or slight sulfur smell, but still clean and enjoyable. The water is extremely salty and dense.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage.
Ability to be Alone: ★★★★★ – 5 stars: Secluded pools or private soaking areas with minimal crowds. It is very quiet and health-focused.
Water Temperature: ★★★☆☆ – 3 stars: Water may be slightly too hot or cold for extended soaking; some basins are very intense.
Health Benefits: ★★★★★ – 5 stars: Rich mineral content with documented therapeutic benefits for specific conditions, especially bone and skin health.
Nearby Amenities: ★★★★☆ – 4 stars: Some amenities available nearby, requiring short travel.
Webpage:Termas de Sáenz Peña
8. Termas del Daymán
Across the border into Uruguay, the thermal waters continue. Daymán is the most popular in the country and offers a high concentration of minerals and very high temperatures.
The area has several thermal complexes, public and private, complete accommodation of 1 to 4 stars, with hotels, motels, bungalows, cabins, camping, restaurants, thermal spa and a mini bus terminal. The pools of the thermal parks have maximum temperatures of 44 degrees celcius.
There are so many amazing places to stay that tap into the hot springs here. Hotel Termal Dayman is only steps from a thermal pool with rooms with hot tubs and some with kitchens.
I also like the nearby Los Naranjos Termal with more services like a restaurant, children's club, year-round outdoor pool, indoor pool, pool tables, ping pong, sauna and garden.
The hot water arises from 2,000 meters deep, to 46 degrees celcius, at a rate of 160 thousand liters of water per hour. It contains iodine, iron, calcium, magnesium and fluoride with obvious and permanent radioactivity, ideal for crenotherapy and relaxing balneotherapy.
Water Quality: ★★★★☆ – 4 stars: Minor sediment or slight sulfur smell, but still clean and enjoyable.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage.
Ability to be Alone: ★★☆☆☆ – 2 stars: Busy atmosphere, shared pools with limited privacy.
Water Temperature: ★★★★★ – 5 stars: Multiple pools with varying temperatures to suit individual preferences.
Health Benefits: ★★★★★ – 5 stars: Rich mineral content with documented therapeutic benefits for specific conditions.
Nearby Amenities: ★★★★★ – 5 stars: Spa services, restaurants, lodging options, and recreational activities within walking distance.
Webpage:Termas del Daymán
9. Termas de Arapey
The most exclusive and "back-to-nature" of the Uruguayan resorts. Arapey is situated in a stunning landscape of rolling hills and rivers, about 7 hours from Iguazu.
It is the first thermal center in Uruguay. It is located 80 km north of the city of Salto.
The water contains iodine, iron, calcium, magnesium and fluoride and is negative in arsenic and poor in sulfates and nitrates.
Lots of old psychedelic architecture mixed with abandoned western memorabilia. The indoor pool looks like and old pool from a crazy sci-fi movie!
But you should definitely stay at one of the most coveted resorts in town, Arapey Thermal Resort & Spa. This All Inclusive thermal resort has spa facilities including sauna and massage sessions along with a kid’s club.
Water Quality: ★★★★★ – 5 stars: Crystal clear, naturally filtered, and free of any unpleasant odors or contaminants.
Ease of Access: ★★★★☆ – 4 stars: Requires a short hike or walk on well-maintained paths between the various hotel complexes.
Ability to be Alone: ★★★★☆ – 4 stars: Larger pools with designated quiet zones or secluded areas available.
Water Temperature: ★★★★★ – 5 stars: Multiple pools with varying temperatures to suit individual preferences.
Health Benefits: ★★★★★ – 5 stars: Rich mineral content with documented therapeutic benefits for specific conditions.
Nearby Amenities: ★★★★★ – 5 stars: Spa services, restaurants, lodging options, and recreational activities within walking distance.
Webpage:Termas de Arapey
10. Termas de Salto Grande
Located near the massive Salto Grande hydroelectric dam, this upscale resort (Hotel Altos del Arapey or Hotel Horacio Quiroga) offers a pristine thermal experience with a focus on luxury.
The park is installed on the site of the Termas de Salto Grande, inside the luxurious Hotel and Spa Termal Horacio Quiroga. This area of absolute tranquility and great natural beauty is located just ten kilometers from the city of Salto and a few minutes from the Termas del Dayman.
Kids under 3 are free!
Water Quality: ★★★★★ – 5 stars: Crystal clear, naturally filtered, and free of any unpleasant odors or contaminants.
Ease of Access: ★★★★★ – 5 stars: Easily accessible by paved road, with ample parking and clear signage.
Ability to be Alone: ★★★★☆ – 4 stars: Larger pools with designated quiet zones or secluded areas available.
Water Temperature: ★★★★★ – 5 stars: Multiple pools with varying temperatures to suit individual preferences.
Health Benefits: ★★★★☆ – 4 stars: Noticeable mineral presence with potential health advantages.
Nearby Amenities: ★★★★★ – 5 stars: Spa services, restaurants, lodging options, and recreational activities within walking distance.
