"We invite you to tour our sculpture garden in stone, built by one man, Edward Leedskalnin. From 1923 to 1951, Ed single-handedly and secretly carved over 1,100 tons of coral rock, and his unknown process has created one of the world's most mysterious accomplishments. Open every day, the Coral Castle Museum welcomes visitors from around the world to explore this enchanting South Florida destination"
https://coralcastle.com/
Coral Castle - Homestead, Florida