1. Aqua Dome, Austria 
Aqua Dome is a deluxe spa resort in Tyrol, Austria, that offers superb alpine views from the inside of a big thermal basin
At this futuristic thermal resort, visitors can float in a large brine basin filled with warm water just under 100 degrees Fahrenheit while gazing at the magnificent Alps.
Located in the heart of the scenic Ötztal valley, Aqua Dome brings together natural materials, like wood and stone, with modern ones, like glass and steel.
2. Gellért Baths, Budapest
With more than 100 thermal springs, it's no wonder the city of Budapest in Hungary presents some of the world's most impressive medicinal baths and spas.
Located within the lavish Hotel Gellért, the Gellért Baths stand out for the grandiose Art Nouveau furnishings, stained-glass windows, and intricate mosaics, which could easily be part of a stylish Wes Anderson movie set.
3. Mornington Peninsula Hot Springs, Australia
Peninsula Hot Springs in the Australian Mornington Peninsula is a geothermal spa oasis in Victoria, Australia, fuses over 50 globally-inspired bthat are built around the bathing experiencies Mornington Peninsula's geothermal mineral waters, which flow into indoor or outdoor pools and baths.
Some of the areas feature fun amenities like underwater speakers, hammocks, cafes, ice caves, and saunas. Peninsula also offers spa treatments and glamping accommodations right next to the springs
Pass by the spa dreaming center for the cold plunge pool, massaging bamboo showers, hanging tree pods, poolside lounges, and fine dining.
Guests can also stay at Peninsula's luxurious tents for a glamping experience.
4. Termas Geométricas, Chile
Located in Villarrica National Park,Termas Geométricas is the largest complex of hot springs in Chile
Designed by architect Germán del Sol, Termas Geométricas is a hot-spring complex structured in the form of a maze.
Immersed deep within the Villarrica National Park near the city of Pucón in Chile, this architectural masterpiece is situated next to the Aihué stream.
Below the stream, healing thermal waters bubble at up to 113 degrees Fahrenheit, thanks to their proximity to the magmatic layer of the Villarrica volcano.
5. Grutas Tolantongo, Mexico
Is a natural hot-spring park in Hidalgo, Mexico, that has cliffside infinity pools, caves, and waterfalls
Located in Hidalgo, Mexico, Grutas Tolantongo is a park of hot springs surrounded by nature. Is a natural hot-spring park in Hidalgo, Mexico, that has cliffside infinity pools, caves, and waterfalls
This geothermal paradise boasts an array of cliffside infinity pools filled with mineral-infused water that's heated by the surrounding volcanic mountains.
The pools are literally built into a cliff, straddling different levels, which makes for some mesmerizing views.
Adventurers will also love the park's caves, rivers, waterfalls, and thermal tunnel The caves, rivers, and tunnel overflow with warm waters that produce steam that rises out of the trees in a dream-like manner.
The resort is accessible by car and by bus. It also has a restaurant and a hotel, if you're looking to stay.
6. Terme di Saturnia, Italy
The thermal springs of Saturnia, an ancient village in Italy's Tuscany, are so beautiful that some believe they were created by the hands of a god.
According to legend, god of peace and abundance Saturn threw a thunderbolt into a volcano crater, causing a river of water to flow over plains and mountains, thus bringing peace and quiet.
All myths aside, the sulfurous Terme di Saturnia springs have been around for centuries and are said to benefit those with certain skin conditions and muscle ailments.
The sulfurous spring water feeds Saturnia's waterfalls and natural pools
The village is now known among visitors as a proper spa town, where 800 liters of water per Second flow over the land and its various formations. The water is just under 100 degrees Fahrenheit.
The town's most iconic spot is the Cascate del Mulino, a gorjeos setting where hot, white waters from the waterfalls continuously drop on limestone, forming a group of natural pools.
7. Natural thermal pools on the beach ,New Zealand
The natural thermal pools emerging from Hot Water Beach's sand in New Zealand resemble otherworldly moon craters
Visitors might have to dig a little deeper for this underground thermal wonder, but it's definitely worth the effort.
Hot Water Beach, on the east coast of the Coromandel Peninsula in New Zealand, gets its name from the hot springs bubbling beneath the surface of the sand.
The water below can be as hot as 150 degrees Fahrenheit before it reaches the surface, naturally filtered, at low tide.
The best time to visit is within two hours on either side of low tide
Less than two hours before or after low tide is when locals and tourists tend to flock to this otherwise quiet beach.
8. Thermal waters of Hanmer Springs, New Zealand
The small town of Hanmer Springs in Canterbury, New Zealand, is built around hot springs gushing from a fractured bedrock.
Although this alpine village is famous for its numerous mountain trails and ski slopes (ideal for some serious hiking), its natural hot springs turn it into an Instagrammable delight.
9. Szechenyi Spa Baths, Budapest
One of the largest medicinal baths in Europe, the Szechenyi Spa Baths in Budapest, Hungary, remain one of the city's most visited sites.
The baths were built between 1909 and 1913 in the City Park and designed by architect Győző Czigler in Neo-baroque and Neo-Renaissance styles that make them extra photogenic.
10. Blue Lagoon, Iceland
Located on the Reykjanes Peninsula in southwest Iceland, a region known for its barren soil and cone-shaped volcanoes, Blue Lagoon is famous for a reason.
Its hot waters' milky-blue shade contrasts the surrounding black lava field, composing one of the most mind-blowing views.
Formed in 1976, the lagoon is supplied with water from a nearby geothermal power plant
The Blue Lagoon is man-made and dates back to 1976. The water, which is supplied from a nearby geothermal power plant, renews itself every 48 hours and sits at around 100 degrees Fahrenheit year-round.
The Lagoon spa will let visitors swim in it for a fee and, due to the popularity, pre-booking is absolutely required.
To make the most of the magical landscape, be sure to visit the Blue Lagoon in the evening to see the midnight sun or the glorious Northern Lights, depending on the season.