The Dubai Fountain, designed by WET Design.

It’s “illuminated by 6,600 lights and 50 colored projectors; 900 feet long; shoots water 490 feet into the air; and is synchronized with classical and contemporary Arabic and world music.  It’s located right by the Burj Dubai, the world’s tallest building.  Oh, and it cost $217 million to build.

[Via Gizmodo; Wiki]