For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
Caverns of Sonora
Caverns of Sonora contains unusual formations, such as bladed helictites and coralloid growths, and is of exceptional beauty.
Location: Sutton County, TX
Year designated: 1965
For additional information see:
Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012