Big Bone Cave
Big Bone Cave is significant primarily because of the discoveries of giant ground sloth bones in the cave passages. Scarcely less significant are discoveries of the bones of an herbivore about the size of a bear, and other animals. Located within Big Bone Cave State Natural Area, artifacts of the War of 1812 and Civil War saltpeter mining operations are also remarkably well preserved in the cave.
Year designated: 1973
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.