The Mel Fisher Maritime Museum tells one of the most extraordinary treasure-hunting stories in history, and the evidence is right in front of you: gold bars, silver coins, emeralds, and jewellery recovered from the Spanish galleon Nuestra Señora de Atocha, which sank in a hurricane in 1622 and was found by Mel Fisher in 1985 after a 16-year search.
The museum handles the story well — the obsession, the legal battles, the tragedies, and ultimately the discovery. Artifacts are well-displayed and the size of the haul is genuinely impressive. It's a compact museum that can be done in 90 minutes, and it connects Key West's history to its identity as a place where fortunes are made at sea.