This crazy art installation by Argentine artist Leandro Erlich, completely trips you out - you think these people are standing underwater, and you start wondering, weights on their feet? Do they have breathing tubes? WTF? Then you realize it's a brilliantly crafted illusion.
The installation is currently at the P.S.1 Contemporary Art Center in New York.
Here's a snippet from Artabase.net about it:
"Erlich has constructed a full-size pool, complete with all its trappings, including a deck and a ladder. When approached from the first floor, visitors are confronted with a surreal scene: people, fully clothed, can be seen standing, walking, and breathing beneath the surface of the water. It is only when visitors enter the Duplex gallery from the basement that they recognize that the pool is empty, its construction a visual trick fashioned by the artist. A large, continuous piece of acrylic spans the pool and suspends water above it, creating the illusion of a standard swimming pool that is both disorienting and humorous."