Technically, Aerophile (the giant balloon at Disney Springs) is not a "hot air" balloon, but a tethered helium balloon. While a traditional hot air balloon uses a propane burner to heat the air inside the envelope to create lift, Aerophile is filled with 210,000 cubic feet of helium, which is naturally lighter than air and provides constant buoyancy. Because it is tethered to the ground by a high-strength steel cable and controlled by a sophisticated electric winch, it can only move vertically and does not "fly" freely across the landscape. This allows it to operate safely in a relatively small footprint while carrying up to 29 passengers at a time to an altitude of 400 feet. The experience provides 360-degree views of the Walt Disney World Resort and the surrounding Orlando area. Flights are highly dependent on weather conditions; even if it is a sunny day, high winds at the 400-foot level can cause the attraction to close for safety. Because it is a "lighter-than-air" craft, it is often confused with a hot air balloon, but the mechanics of using helium and a tether make it much more stable and predictable for a tourist environment.