The Minuteman Missile National Historic Site Visitor Center is the National Park Service orientation and interpretation facility for the Cold War Minuteman intercontinental ballistic missile system. Exhibits, the 30-minute Beneath the Plains park film, bookstore and ranger staff introduce visitors to the three-site park and its Delta-01 launch-control and Delta-09 missile-silo heritage; begin here before traveling the separate Interstate 90 sites. The current NPS visitor-center schedule lists summer hours of 08:00–16:00 daily and winter hours from September 7 through May 17 as Tuesday–Saturday 08:00–16:00, with Sunday/Monday closure and seasonal federal-holiday exceptions; weather or safety conditions can alter access. Entrance to the historic site and visitor center is free with no entrance pass required. Visitor address: 24545 Cottonwood Road, Philip, South Dakota 57567, United States; confirm current NPS operating notices and the separate Delta-01 tour reservations before travel.