Leandro Erlich , an argentinian artist created this fake pool called The Swimming Pool, for The 21st Century Museum of Contemporary Art in Kanazawa, Japan.
Two clear acrylic glasses about a foot apart and filled the space in between with water. The top surface is also filled with about 4 to 5 inches of water so that it looks like a realistic pool. Brilliant Leandro!!

We want on in our flat!