Wind Cave National Park, South Dakota: Wind Cave is known for its complex passages and unique boxwork formations. Guided tours take visitors through underground chambers filled with calcite formations and rare cave features.
Jewel Cave National Monument, South Dakota: Jewel Cave is the third longest cave in the world and features stunning calcite crystals, cave formations, and underground chambers.
Oregon Caves National Monument, Oregon: Tucked away in the Siskiyou Mountains, Oregon Caves features marble corridors, stalactites, and stalagmites.
Mammoth Cave National Park, Kentucky: Mammoth Cave is the longest known cave system in the world, with over 400 miles of explored passageways.
Lava Beds National Monument, California: Lava Beds National Monument is home to over 700 lava tube caves formed by volcanic activity.
Carlsbad Caverns National Park, New Mexico: Carlsbad Caverns features a vast underground chamber known as the Big Room, which is filled with stunning formations such as stalactites, stalagmites, and columns.
Lehman Caves, Great Basin National Park, Nevada: Lehman Caves is a beautiful marble cave featuring intricate formations such as stalactites, stalagmites, helictites, and cave shields.