Twice an hour (or, at night, every 15 minutes) the 1,100 fountains shoot as high as 240 feet into the air, choreographed to music including everything from the classic arias of Luciano Pavarotti to show tunes, and from Liberace to the romantic stylings of Frank Sinatra. More than a thousand fountains dance in front of the hotel. At just barely under 20 million gallons and 8.5 acres, Lake Bellagio is easily the largest musical fountain system in the world.