Dry Tortugas National Park is in the Gulf of Mexico, west of Key West, Florida. It comprises 7 islands, plus protected coral reefs. Garden Key is home to beaches and the 19th-century Fort Jefferson. Loggerhead Key has a lighthouse and sea turtles. On nearby Loggerhead Reef, the Windjammer Wreck, the remains of an 1875 ship, is a popular dive site. Bush Key is a nesting site for seabirds like sooty terns.