Bone Cave (also Big Bone Cave or Bonecave) is an unincorporated community in Van Buren County, Tennessee, United States. It lies near U.S. Route 70S northwest of the town of Spencer, the county seat of Van Buren County. Its elevation is 965 feet (294 m), and it is located at 35°46′30″N 85°35′6″W / 35.77500°N 85.58500°W / 35.77500; -85.58500 (35.7750675, -85.5849782). The various forms of its names led the Board on Geographic Names to decide on the official form of the community's name in 1895.
The community is named for nearby Big Bone Cave, one of the most famous and historic caves in Tennessee. Big Bone Cave was named for the discovery of a giant ground sloth skeleton in 1811 during the mining of cave dirt to be processed for saltpeter.
At one time the community had its own post office, the Bone Cave Post Office. This post office closed some time after 1980.[original research?]
Coordinates: 35°46′30″N 85°35′06″W / 35.7750675°N 85.5849782°W / 35.7750675; -85.5849782