The closest cave to Mount Rushmore! Discover stalactite-filled caverns, cave formations, and the amazing Big Room. Learn from knowledgeable guides about the history and geology that formed the world-renowned Black Hills cave systems. Guided Tours, no reservations needed.
Phone: http://605-255-4384
Address: 13622 SD-40, Keystone, SD 57751
Website: http://www.rushmtn.com