Walls could be made from bricks and concrete, stones, wood, glass, and even fabricated material. But a wall made of water is something unheard of. Danish artist Jeppe Hein has created one such piece of art. The triangular structure is made of two-spyglass mirror and wall of water. The water wall, which is activated by a sensor drops when people are extremely close to it. Once you enter the flow picks up again and the wall is created. People can look outside the triangle through the two-way mirrors and also reflect each other, the water, the visitors, and the surroundings, causing everything to seem to visually dissolve.