National Natural Landmarks
Ellenville Fault-Ice Caves
The Ellenville Fault-Ice Caves, located within Sam's Point Preserve, contains the largest known exposed fault system in the United States, along with a series of ice caves formed from fault debris.
Location: Ulster County, NY
Year designated: 1967
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.