The Museu Do Ar is based on an Base Aerea No 1 irfield just out Sintra, near Lisbon, Portugal. The museum has a modern entrance which leads into a complex of three hangers which have aircraft from all eras displayed in them. More aircraft are on display on an apron area in front of the hangers. The collection of aircraft and other exhibits show what the Portuguese Air Force have operated over the years. This is the main museum with a second site at Alverca which has limited opening hours.