The Udvar-Hazy Center Tour Desk is located on the Museum floor, in the center of the Boeing Aviation Hangar. Docents (volunteer tour guides) are available from opening until about 4:00pm, depending on volunteer availability. Highlights Tours are given every day at 10:30am and 1:00pm. However, Docents are often happy to give walk-up tours if volunteers are available. Please inquire at the Tour Desk.