This old fortress was built to resemble an old Italian Martello-style coastal watchtower (hence the name), a design that quickly became obsolete with the advent of the explosive shell. Now the fort serves a new purpose: preserving the old. There's historical memorabilia, artifacts, the folk art of Mario Sanchez and ‘junk’ sculptor Stanley Papio, who worked with scrap metal; plus a genuinely creepy haunted doll.
Perhaps the most haunted thing in Key West, 'Robert the doll' is a terrifying child’s toy from the 19th century who reportedly causes much misfortune to those who question his powers. Honest, he looks like something out of a Stephen King novel; see www.robertthedoll.org for more information.