If you're planning on vacationing in Cuba in the future, be sure to snorkel, because you might just find some pearls! In 1715, the San Miguel and fleet of five treasure ships sailed from South America to bring the treasure back to Spain. The ships never made it to Spain because they got hit by a hurricane and sunk near Cuba. When the Spanish tried to uncover the shipwrecks, they were attacked by pirates and never saw any of the treasure, which included gold, silver, pearls, and jewels.