Located beneath the Chihuahua desert in Mexico, the Cave of the Crystals is an otherworldly sight. Famous for its enormous selenite crystals—some of the largest in the world—this cave has an atmosphere that feels like it’s straight out of a fantasy novel.
The crystals can reach lengths of up to 36 feet, creating a stunning, surreal environment. Due to extreme conditions, including high temperatures and humidity, the cave is not accessible to casual tourists, but guided tours and research expeditions do take place, offering a rare opportunity to explore this geological marvel.
15. Cave of the Mounds – Wisconsin, USA
