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Diamond Caverns

For over 153 years Diamond Caverns has offered tours of Kentucky's most beautiful cave. Presented by state-of-the-art lighting, Diamond Caverns features intricate drapery deposits lining the halls in cascades of naturally colorful calcite with thousands of stalactites, stalagmites and flowstone deposits throughout the entire tour.

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Inner Space Cavern

Inner Space cavern was discovered by a Texas Highway Department core drilling team in the Spring of 1963. Six inch core samples were taken to determine if the ground was stable enough to support a large highway overpass. As they were drilling one of the test holes, the bit suddenly dropped 26ft. and the highway crew knew there was something down there besides rock.

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Limestone Caves

National Caves Association

Celebrating 50 years, the Association has a membership of over 80 caves across the nation including Barbados and Bermuda.

About the NCA

The National Caves Association is a non-profit trade association founded in 1965 by a small group of private show cave owners.  These initial members sought to bring together show cave owners and operators from across the United States to promote the show cave industry to the public, to share information and ideas, and to lobby for legislation favorable to the show cave industry.

Over the years the Association has become more than an industry trade organization, it has become an association of friends and colleagues willing to share ideas and information and to lend a helping hand when needed.  The membership has grown from those few early members to over 80 show caves located across the U.S., Bermuda and Barbados.

For the past 50 years members of the Association have gathered at different locations across the United States and Bermuda for an annual convention.  It is during the annual convention that the members renew old acquaintances, make new friends, share ideas, information and experiences, and learn from one another about the challenges and triumphs and the failures and successes of operating a show cave.  The annual convention is one of the most eagerly anticipated events of the year and for many members the greatest benefit of membership.

The National Caves Association has been very active in promoting cave visitation, developing affordable cave insurance programs, helping develop and implement industry standards on alpha radiation in caves, educating the public on White Nose Syndrome (WNS), a sometimes fatal illness that has decimated large parts of bat populations in the eastern United States, and has become a repository of information on a wide variety of topics related to the show cave industry.