Devil's Sinkhole is a deep, bell-shaped, collapsed limestone sink with cave passages extending below the regional water table. Located within Devil's Sinkhole State Natural Area, it is the best example of a collapsed sink along the Balcones Fault and within the Edwards Plateau region of Texas. The sinkhole provides habitat for a colony of bats estimated to number in the several millions.
Year designated: 1972
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.