Coral Castle

Edward Leedskalnin Coral Castle.

While Edward Leedskalnin work at night.

some people say that the stone float and levitate.

The coral stones sames to float during night was due to the dark color of the chain he used that blend with the darkness of the night.

The pulley mechanism he used was greet. The more the loop of chain, the stronger it got.

I think the box at the top of the tripod he used was just used to hold the 3 Pole.
.