The Swimming Pool by Argentine artist Leandro Erlich, is an extraordinary installation, with visual humor. The disorienting long term installation was exhibited for about 2 years at MoMa PS1 Contemporary Art Center in New York, in the unique double height Duplex Gallery. When approached from the first floor, visitors would see fully clothed people, walking and breathing below the surface of the water. It's only when visitors enter the Duplex gallery from the basement that they recognize the pool is empty. It's very amusing!