Promontory:  1. A point of high land projecting into a body of water.
2. A projecting part of the body, for example, of a bone.

“No man is an Island, entire of itself; every man is a piece of the continent, a part of the main; if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as if a manor of thy friends or of thine own were; any man’s death diminishes me, because I am involved in mankind; And therefore never send to know for whom the bell tolls; It tolls for thee.”  John Donne; Devotions upon Emergent Occasions; 1624.