Nothing compares to the grandeur of discovering a crystal cave while traveling the world. From twinkling formations made up of mineral deposits to shimmering grottos full of quartz crystals and other precious stones, these sparkling underground gems provide a once-in-a-lifetime experience sure to make any adventurer’s trip an unforgettable one. Here are some of the exciting crystal caves you can explore around the globe. The Blue Grotto is the symbol of Capri located in Italy. This is a sea cave on the island’s coast and is known to everyone who visits the area. The cave is unique for its bright blue light coming from two places: the entrance to the cave (a small hole that can only fit one boat at a time) and a larger hole below the entrance. Viewed from inside the cave, the entry appears as a bright white light just above the waterline, while a more extensive light source, the underwater opening, emits a bluish glow.

Getty Images/Moment/Wachirawit Narkborvornwichit

Mammoth Cave National Park, Kentucky, USA, is a fantastic national park with the longest cave system in the world, with many exciting sections and underground passages. You can choose one of the many guided tours to see the spectacular features of Frozen Niagra, Grand Avenue, and Fat Man’s Misery. The historical and Dome and Dripstone tours are highly recommended as they allow you to explore unique formations. Among the most famous caves in America, Mammoth Cave is a great place to visit with the family. These sites can be seen on a six-hour tour. More adventurous tours are also available, such as venturing out of the developed part of the cave and into muddy crawl spaces and dusty tunnels.

Of all the caves, the most impressive is the Crystal Cave, located in Chihuahua, Mexico, located 300 meters below the surface. The main chamber contains a crystal the size of a giant pillar never seen before. Some of them reach a height of up to 11 m and a weight of about 55 tons. Formed from the magma beneath the cave, these crystals are believed to be 500,000 years old. Conditions inside the cave are extreme, and proper equipment is required to visit this massive structure.