Do you prefer to keep your gym at a warm temperature while y? Discover Earth's Heat.

1. Geothermal Laundry and Bread Ovens

Laugarvatn, Iceland Locals here still bake bread in the ground and once used geothermal steam to wash clothes.

2. Ancient Healing River

Loutraki Aridaias, Greece Bathe in a naturally warm river flowing directly from a mountain cave, used since antiquity for healing.

3. The Petrifying Well

Knaresborough, England A natural spring that turns everyday objects to stone, once believed to be the work of a witch.

4. The Boiling River

Shanay-Timpishka, Amazon Rainforest, Peru A river in the Amazon so hot its waters can literally boil small animals, a geological enigma.

5. The Door to Hell

Derweze, Turkmenistan A perpetually burning crater in the desert, accidentally ignited by Soviet engineers over 50 years ago.

6. Beachside Hot Tubs

Coromandel Peninsula, New Zealand Dig your own personal hot tub on the beach, fed by geothermal springs bubbling up through the sand.

7. The World's Youngest Geothermal Valley

Rotorua, New Zealand Home to Frying Pan Lake, one of the largest hot springs globally, formed by a single massive eruption.

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