The Gay Head cliffs of Martha’s Vineyard are a National Natural Landmark. “The famous colored cliffs at Gay Head are perhaps the most striking and well-known natural feature of the Vineyard and may be the largest display of Pleistocene [ice age] sediments to be found anywhere in the world,” wrote Anne Hale in Moraine to Marsh: A Field Guide to Martha’s Vineyard (Watership Gardens, 1988).