4. Coral Castle, Florida

The Coral Castle is actually a sculpture garden with forms purely sculpted from Coral Rock. Between 1923 and 1951, Ed Leedskalnin created his wonderland by carving 1,100 tons of coral rock. The most mysterious part is that nobody knows what skills or tools he used to create this masterpiece. The only think that is known for certain is that he didn’t have access to any sort of machinery. Some of Leedskalnin’s art includes a set of functioning rocking chairs and a 9-ton gate that opens with the touch of a finger. For an admission fee, anyone can check out Leedskalnin’s remarkable work in southern Florida.