America's Most Mysterious Places
© DK / Alamy
Coral Castle, Homestead, FL
The Mystery: Made from 1,100 tons of megalithic-style limestone boulders—some heavier than the Pyramids’ and bigger than those at Stonehenge—this unusual structure, located 25 miles south of Miami, was built from 1923 to 1951 by a single man, a diminutive Latvian immigrant named Edward Leedskalnin, as an homage to the love of his life who left him on the eve of their wedding. But how did he do it?
Fact: Leedskalnin claimed he knew the secret to the Great Pyramids’ construction, and was once witnessed levitating stones. Other construction details—no mortar, precision seams, impossible balancing acts—have also stumped scientists for decades.