1. BLUE LAGOON HOT SPRINGS, ICELAND

Iceland's Blue Lagoon has become a bucket list destination for many. The unique lagoon is filled with mineral-rich, milky aquamarine water and is surrounded by black lava rocks. No matter what time of year you visit, it's wonderful to bathe in those exceptionally warm waters, although it may be most ideal when the snow is softly falling or on a chilly rainy day when the mist is on fire. Visitors can also indulge in underwater massages, and enjoy skin-enhancing treatments such as an algae face mask or a volcanic rock scrub. There is a small cafe in between to have a drink like a healthy smoothie, a glass of wine, or a beer.

2. PAMUKKALE HOT SPRINGS, TURKEY

For thousands of years, people have bathed in the Pamukkale Hot Springs, located north of the city of Denizli in southwestern Turkey. This UNESCO World Heritage Site was famous as a spa center during Roman times, with castles being built after several earthquakes, which led to the emergence of mineral-filled hot springs. Calcium and hydrogen carbonate react to form calcium carbonate, or travertine, and limestone, which is what gives the area its white color and helps form the pool. Accessed through a gate, reached with a 30-minute hike, there are several pools, all no more than a foot deep.

3. GRAND PRISMATIC HOT SPRINGS, UNITED STATES

The largest in America and the third largest in the world, the Grand Prismatic Hot Spring is located in Yellowstone National Park. The size of this spring is about 250 to 300 feet i.e., 75 to 91 meters and it is about 160 feet i.e., 49 meters deep. The temperature of the water present in it always warm up to 160 Fahrenheit i.e., 71 centigrade. 560 gallons of water i.e., 2000 liters is always present in this spring. Grand Prismatic Hot Spring offers the wonderful experience of enjoying the warmth of ice-drenched water, and is possibly the best place to relax in mother nature's lap.

4. KLONG THOM HOT SPRINGS, THAILAND

Klong Thom, or Krabi Hot Springs, is considered one of Thailand's most spectacular natural wonders, located within a small forest preserve. This top attraction in Krabi is made up of naturally hollowed-out 'bathtubs' that sit in smooth stone, which fill with natural fresh running spring water in temperatures that range from 95 to 107 degrees. After soaking, you can enjoy a refreshingly cool dip in the river below or visit the nearby Khao Phra Bang Khram Nature Reserve, home to a large natural pool with cool spring water for swimming.

5. BANFF UPPER HOT SPRINGS, CANADA

Banff is famous for its outdoor adventures such as hiking and skiing in Banff National Park, and after a day of play, there may be no better way to soothe those sore muscles than with a trip to Upper Banff Springs. The hot springs were discovered in 1884 and continue to draw visitors with year-round temperatures between 98 and 104 degrees and a spectacular backdrop of mountains to gaze at. First Nations people believed the springs to be sacred waters that could cure diseases and support good health, and over the decades, they have become one of the park's most popular attractions.

6. GLENWOOD HOT SPRINGS, COLORADO

Glenwood Springs is located in the heart of the Colorado Rockies and hosts one of the hottest hot springs in the world. It flows from Yampa Spring which produces three million gallons of water every day at a temperature of 122 million Fahrenheit. By the time it reaches the pool, it has cooled to 104 degrees with a pleasant breeze. The Glenwood Hot Springs Pool is the largest hot spring pool on the planet, offering plenty of room to soak, swim and splash around. There is even a lap lane and diving area at the west end. During the warmer months of the year, the brand new, family-friendly Sopris Splash Zone is open on the west end and features three separate areas for aquatic fun. Shoshone Chutes is a fast-paced river ride on tubes; Hanging Lake has a waterfall, wading pool, and small slides for the little ones; And the Grand Fountain is a splash pad during the day and a fountain after hours.