When rain hits the Florida Keys, the focus shifts from the water to the islands' rich indoor culture and history. Key West offers several excellent indoor options, such as the Ernest Hemingway Home and Museum, where you can explore the author’s study and meet the famous polydactyl cats. The Key West Butterfly and Nature Conservatory provides a glass-enclosed, rain-proof tropical paradise. For history buffs, the Mel Fisher Maritime Museum showcases treasures from Spanish shipwrecks, and the Harry S. Truman Little White House offers a fascinating glimpse into presidential history. You can also explore the various art galleries on Duval Street or spend a rainy afternoon at the Florida Keys History & Discovery Center in Islamorada. Of course, a rainy day is also the perfect excuse to visit a local distillery for a rum tasting or find a cozy spot for a slice of authentic Key Lime pie. While the beaches may be grey, the Keys' vibrant bar and restaurant scene ensures that the "island vibes" continue regardless of the weather outside.