Steven F. Udvar-Hazy Center
FreeWalk two huge hangars at Dulles Airport holding Space Shuttle Discovery, an SR-71 Blackbird and a Concorde.

Photo: Billy Hathorn, CC BY 3.0, via Wikimedia Commons. Cropped and resized.
Manassas National Battlefield Park is a sightseeing stop in Manassas, VA, part of the Washington DC guide. Cost: free.
6511 Sudley Rd · Manassas, VA
The park preserves more than 5,000 acres where the First and Second Battles of Manassas, also called Bull Run, were fought. Start at the Henry Hill Visitor Center for Civil War artifacts and an orientation film, then walk out to the statue of Thomas J. Jackson, who earned the nickname Stonewall here. Hiking trails and a driving tour link the Stone House, which sheltered wounded in both battles, the Stone Bridge, the unfinished railroad and Chinn Ridge. No entrance pass is required.
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