This pool is an illusion

This is not a real pool, but an art installation created by the Argentine sculptor Leandro Erlich. He constructed a full-size pool, complete with all its trappings, including a deck and a ladder, where a large, continuous piece of acrylic suspending water on top creates the illusion of a real swimming pool full of water. See for instance ps1.org and kanazawa21.jp. Via webecoist.com.