Lost Sea (Craighead Caverns)
The Lost Sea cavern system includes the largest known underground lake in the country, an abundance of crystal clusters called anthodites, stalactites, stalagmites, and a waterfall. The site once yielded bones and footprints of a giant Pleistocene jaguar.
Year designated: 1974
Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.