Mexico, which belongs to the Pacific Ring of Fire, is a country with abundant geothermal resources. A shocking spot that symbolizes this. A huge amount of warm water gushes out of a giant limestone cave, and there is a hot spring theme park surrounding the flowing water. Mysterious waterfall It takes three and a half hours to drive north from Mexico City. There was a mysterious hot spring waterfall deep in the mountains that could best be described as unexplored. Hot springs spouted from the limestone bedrock, and there were two limestone caves of different sizes behind the waterfall. Warm water that flowed out from here became a river, and a vast theme park was formed around it. The park was equipped with a full range of facilities, including hotels (reservations not accepted), campgrounds, and restaurants Stunning limestone cave To the left of the waterfall, there was a small cave a few dozen feet deep that I could explore inside. With no lights, warm water spouting from everywhere, and little visibility, it was dangerous. There was a large cave behind the waterfall basin, and inside was a huge pool with nature intact. The water temp was lukewarm, about100 degrees F, but the entire cave was surrounded by warm air and felt like the right temperature. Other than being cloudy and white, the water was not very distinctive and was smooth to the touch. The ceiling near the center of the cave supplied an enormous amount of thermal water. Underneath that waterfall, the Mexicans were enjoying ...