The University of Phoenix Stadium, with its retractable roof and field, is unlike any other stadium in North America, and a marvel of design, engineering, and technology. This multi-purpose facility is located in Glendale, Arizona. The primary tenants in the stadium include the NFL's Arizona Cardinals and the Annual Tostitos Fiesta Bowl. The 63,400-seat stadium (expandable to 72,200) opened on August 1, 2006 after three years of construction. The ceremonial groundbreaking was held on April 12, 2003.