The venue was built for approximately $12 million, and opened on June 14, 1991, with a performance by Steve Winwood. The Hollywood Casino Amphitheatre (originally Riverport Amphitheatre and formerly the UMB Bank Pavilion and Verizon Wireless Amphitheater) is an outdoor concert venue in Maryland Heights, Missouri, near St. Verizon Wireless Amphitheater (2007–2014)