You Can Swim In The Pool In The Sky At Market Square Tower (12 pics + video)
Market Square Tower in Texas has one of the coolest and most terrifying pools in history. It's called the "pool in the sky" and it's made of 20 cm thick plexiglass that hangs over the edge about the street. People who are brave enough can swim hundreds of feet above the ground and the tower has another pool on the fourth floor for people who are afraid of heights.