The Volcano at The Mirage combines fire with music and choreography.
Designed by the same company that created The Fountains of Bellagio, the volcano includes two volcano systems, a lagoon and fire shooters that shoot flame on demand. These massive fireballs are capable of shooting more than 12 feet into the air. It also features waterfalls with surrounding pools including fire and smoke effects.
(excerpted from http://www.vegas.com/attractions/on-the-strip/mirage-volcano/