The Blue Hole of Santa Rosa, for example, is an unassuming New Mexico lake that's actually ... to be the purest form of selenite crystal in the world. The Cave of the Crystals, or Cueva de los ...

Crystal Cave is reopening after a four-year closure, inviting visitors to marvel at its underground splendor. Tickets for ...

Visit the stunning crystal formations of Crystal Lake Cave in Dubuque. Miners came across the geological wonder while searching for lead and zinc deposits, according to Crystal Lake Cave's website.

The lake cave is one of the most popular spots ... Others suggested making a day of it and enjoying lunch in nearby Rum Point. Cayman Crystal Caves are located near Old Man Bay on the island's ...