Next, Fenn self-published a memoir, "The Thrill of the Chase, " distilling the autobiography and, intriguingly, including a poem that he says offers clues to lead some clever or lucky treasure hunter to the bounty.

NPR: 'I Love Mysteries,' Says Man Claiming Hidden Gold

There certainly seems to be no shortage of believers, including Doug Preston, whose novel "The Codex" about a notorious treasure hunter and tomb robber who buries himself and his treasure as a final challenge to his three sons, is loosely based on Fenn's story.

NPR: 'I Love Mysteries,' Says Man Claiming Hidden Gold

In recent years, he made a widely publicised visit to Bhutan and has been proclaimed the reincarnation of a holy 13th-century Buddhist treasure hunter.

BBC: Bhutan, the kingdom of the clouds

Andy Falconer made the "once in a life time discovery" when out searching with fellow treasure hunter Rob Farrer.

BBC: Bishop's seal found in field on display at museum