At first glance, it's pretty easy to say Las Vegas has an unhealthy water fetish. There's the 22-million-gallon Bellagio fountain, which rockets dancing cylinders of well water 500 feet into the air to the tune of "God Bless the USA." There's the liquid volcano at The Mirage, where water seems to bubble like lava. And, finally, the blue canals inside (inside!) the Venetian hotel, where water buoys gondolas for the amusement of gamblers and tourists.