This annual festival brings together fans of the renowned treasure hunter Mel Fisher and treasure-hunting enthusiasts from around the world. Celebrating the anniversary of Fisher's fantastic discovery of the shipwrecked Spanish Galleon of the Nuestra Señora de Atocha, this year's celebration honors the 400th Commemoration of the Nuestra Señora de Atocha. It includes an opening ceremony at the Tropic Cinema, a special charity event at Key West's Schooner Wharf, a Speakers Symposium, a commemorative banquet at the Key West Marriott Beachside, and a Time Capsule & Plaque Ceremony in Mallory Square. For more information, call 305-296-6533 or visit melfisherdays.com.