St. Louis Municipal Opera Theater - St. Louis, Missouri
Posted by: 
BruceS
N 38° 38.453 W 090° 16.842
15S E 736674 N 4280434
Outdoor amphitheater known as The Muny in Forest Park in St. Louis, Missouri.
Waymark Code: WMCKKN
Location: Missouri, United States
Date Posted: 09/17/2011
Views: 9
The ST. LOUIS MUNICIPAL OPERA THEATER, an open-air theater seating 10,000 occupies a five-acre natural bowl facing Theater Drive at Government Drive. Light opera is presented here each summer during June, July, and August. At both sides of the auditorium are roofed pergolas capable of sheltering 15,000 persons in case of summer showers. The^ stage is the largest outdoor stage In the world, and is designed to facilitate the moving of massive settings. The revolving stage in Its center, also the largest of Its kind, Is capable of making an entire revolution in nine seconds. - Missouri: A Guide to the 'Show Me' State, St Louis section, pg. 322.
The Muny has completed over 90 seasons of productions. The Muny seasons run every year from mid-June to mid-August.
From Wikipedia:
"The Muny website claims it is the "nation's oldest and largest outdoor musical theatre."
There are numerous amphitheatres/outdoor theatres that are much larger in the United States including the Hyundai Pavilion which claims to be the biggest in the United States (with a total capacity of 65,000 consisting of 10,902 seats and 54,098 in the grass). The Hollywood Bowl (opened in 1929) has seats for 17,376. Nikon at Jones Beach Theater (opened in 1952) has seating for 15,000. Nissan Pavilion in Bristow, Virginia (a suburb of Washington, DC), can accommodate up to 25,000 people per event. However most of the larger venues have rotating concerts and individual events rather than musicals."