leandro erlich: swimming pool

One of the coolest art instalations ever... Leandro Erlich's swimming pool is a surreal experience where when visitors approach the pool at first, they are confronted with a strange scene of people, fully clothed, standing, walking, and breathing beneath the surface of the water. The secret to this visual trick is only revealed when visitors enter the Duplex gallery from the basement...

More info and a video of instalation here...

and more of Erlich's work at his website...