Some of our closest parks would be... Algonkian Regional Park in Sterling, Lake Fairfax in Reston, or Great Falls National Park in Great Falls, VA.
Airport and park and ride free.
There is a Best Western Battlefield park in Manassas. I found that to be a more Central location to travel and sightsee
No, this is really just an airport hotel and i would not recommend it for a tourist visit to washington dc.
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