http://cavern.org/acca/accahome.html [1]

" ACCA began informally in 1978, and was incorporated in 1981 as a not-for-profit corporation in Virginia and immediately began national-scale efforts to protect caves and karstlands. In 1986 ACCA moved operations to Horse Cave, Kentucky, and began a unique effort to establish the American Cave and Karst Center (now called the American Cave Museum). Development of the museum involved the ACCA, the City of Horse Cave and major private benefactors from Kentucky. The museum formally opened to the public in 1993.

ACCA is composed of three fundamental components, museums, educational programs and projects and assistance, which can be shown as three interlocking circles; click on each circle for additional information."