Find Your Park logo
Read about the Newest National Natural Landmark
NNL 50th Anniversary

For the more information about the air resources of the National Park Service, please visit

Lost Sea (Craighead Caverns)

Lost Sea (Craighead Caverns)
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.

Location: Monroe County, TN

Year designated: 1974

Acres: 334

Ownership: Private

For additional information see:

← Back to NNL listing for TN.

← Back to listing of all states and territories.

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