Coral Castle

Built by Ed Leedskalnin, a Latvian immigrant who single-handedly and mysteriously excavated, carved, and erected over 2.2 million pounds of coral rock to build this place, even though he stood only five feet tall and weighed a mere 100 pounds. It was built for his sweetheart after she jilted him a day before their wedding saying he was too poor and too old. She never set foot in it even when offered thousands of dollars to do so by magazines, etc. after Ed died.