Jason’s Rock | East Hampton Town, NY

A large glacial erratic boulder named after Montaukett Indian Jason Hoopte, described as an old man who used to pause at that spot on his journeys between Sag Harbor and East Hampton. There is a natural depression on top of the rock that collects rain, ensuring a continual supply of fresh water which, despite the weather, is always cold.
 
(Source: Jason’s Rock – On This Site – Native Long Island)
 
 The rock, seven feet in diameter at the base and six feet high, has been there even before the Indians, stuck in the woods since some glacial commotion. It collected fungus or moss on its shady side, and there is a trough at the top that always seemed to be filled with water.

Even in the driest weather, one could shinny up the boulder and find a pool of water a few inches deep. That was the mystery: where did the water come from?
 
(Source: Solved: the Mystery of the Rock Drinking Fountain – The New York Times)