Longhorn Cavern State Park

The park features historical and nature study. Located in the heart of the Highland Lakes, Longhorn Cavern is near Inks Lake State Park which offers camping and lodging.

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Mercer Caverns

Visitors enjoy the convenience of walkways and electric lighting. Cave tours last about 45 minutes. The cavern temperature is 55 degrees year-round. The tour covers about a quarter mile on walkways and stairs. There are a total of 440 steps, 208 down into the caverns and 232 up out of the caverns. Visitors descend a total of 160 vertical feet below the entrance.

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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.

Purpose of the NCA


The National Caves Association (NCA) is a non-profit trade organization that was organized for the purpose of promoting and improving conditions for the Show Cave Industry throughout the United States by:

    (a) promoting public interest in and attendance at Show Caves;

    (b) promoting public education and awareness with respect to conservation and preservation of all caves, including without limitation Show Caves;

    (c) conducting public relations efforts with respect to matters that are germane to the conservation and preservation of all caves, the operation of Show Caves, and the safety and enjoyment of Show Caves;

    (d) encouraging membership and participation in the Association;

    (e) identifying and addressing issues pertinent to managing, operating and/or owning Show Caves;

    (f) promoting methods of operation of Show Caves that enhance business performance, safety, and the conservation and preservation of Show Caves;

    (g) promoting and supporting legislation that provides for conservation and preservation of caves, including without limitation Show Caves, and promote and support legislation that provides for favorable business conditions for Show Caves;

    (h) presenting information and articulating the Association’s position to government agencies with respect to matters that are germane to the conservation and preservation of all caves, the operation of Show Caves, and the safety and enjoyment of Show Caves;

    (i) conducting annual conventions and educational seminars for members in furtherance of the Association’s purpose;

    (j) implementing industry guidelines for Show Caves;

    (k) compiling, preserving, and publishing cooperative data (technical and promotional) with respect to Show Caves;

    (l) promoting and encouraging the development of a spirit of cooperation, courtesy, and respect among managers, operators, and owners of Show Caves; and

    (m) compiling, developing, publishing and distributing information of pertinence to the Show Cave industry.