Some National Parks preserve fantastic cave and karst resources. Follow the links below to explore some of these places.
Carlsbad Caverns National
Park, New Mexico
El Malpais National Monument,
New Mexico
Everglades National Park,
Florida
Great Basin National Park,
Nevada
Hawaii Volcanoes National
Park, Hawaii
Jewel Cave National Monument,
South Dakota
Lava Beds National Monument,
California
Mammoth Cave National Park,
Kentucky
Pinnacles National Monument,
California
Timpanogos Cave National
Monument, Utah
Wind Cave National Park,
South Dakota
Ozark National Scenic Riverways: http://www.nps.gov/ozar/caves.html
Buffalo National River: http://data2.itc.nps.gov/nature/subnaturalfeatures.cfm?alphacode=buff&topic=38&loc=4
Craters of the Moon National Monument: http://data2.itc.nps.gov/nature/subnaturalfeatures.cfm?alphacode=crmo&topic=38&loc=4
Sequoia and Kings Canyon National Parks: http://www.nps.gov/seki/snrm/geology/cave_karst.htm
Russell Cave National Monument (primarily archaeology): http://www.nps.gov/ruca/home%20page.htm
Oregon Caves National Monument: http://www2.nature.nps.gov/grd/parks/orca/index.htm
Caves and Karst in National Parks