An interesting look at how treasure hunter Mel Fisher and his team found the Spanish galleon Atocha, one of the most valuable shipwrecks ever discovered. The Atocha was lost to a hurricane in 1622, taking with it half a billion dollars’ worth of gold, silver, and emeralds. Mel spent 16 years using historical records, ingenious engineering, and sheer perseverance until the motherlode of treasure was discovered.