Purgatory Chasm is a unique natural landmark that runs a for a quarter of a mile between granite walls rising as high as 70 feet. Popular with picnickers and rock-climbers alike, the chasm is believed to have its origin in the sudden release of dammed-up glacial meltwater near the end of the last Ice Age, approximately 14,000 years ago.
Trails lead to a wide variety of rock formations with names such as The Corn Crib, The Pulpit, The Coffin, Lover's Leap and Fat Man's Misery.
Purgatory State Park, Purgatory Rd., Sutton MA 508-234-3733.