Loudoun County

http://www.visitloudoun.org/Experience-Loudoun/Heritage/Historic-Homes-Sites
http://en.wikipedia.org/wiki/National_Register_of_Historic_Places_listings_in_Loudoun_County,_Virginia
http://www.oatlands.org

Fauquier County

http://www.fauquiertourism.com/historical_trails.html
http://www.fauquiercounty.gov/Government/Departments/CommDev/includes/compplan/appendixC.pdf
http://www.placesdiscovered.com/category/historic/

Clarke County

http://www.clarkehistory.org/
http://www.nationalregisterofhistoricplaces.com/va/Clarke/districts.html
http://en.wikipedia.org/wiki/National_Register_of_Historic_Places_listings_in_Clarke_County,_Virginia

Prince William County

Manassas Battlefield http://www.manassasbullrun.com/index.cfm?CFID=16034382&CFTOKEN=18270084
http://www.historicprincewilliam.org/links.html

Fairfax County

http://www.fxva.com/seedoplan/fairfax-virginia-tourist-attractions/museums/

District of Columbia

http://www.culturecapital.com/feature.php?id=14&gclid=COemnd2e-acCFeM85QodHQr9sw
http://www.wheretraveler.com/classic/us/dc/washington-dc/?gclid=COPxyeie-acCFQbe4AodiRHyqw
Smithsonian - http://www.si.edu/

Near By

Harpers Ferry - http://historicharpersferry.com/