Is there really an elephant graveyard?

From Wikipedia:An elephant graveyard (also written elephant's graveyard or elephants' graveyard) is a fictional place where, according to legend, older elephants instinctively direct themselves when they reach a certain age. They then die there alone, far from the group. The term has entered the proverbial store of English metaphors as a venerable repository or resting place for a collection, group or type.