Triangle: Prince William Forest Park, (hiking, mountain biking, fishing, bird watching, wildlife viewing). From I-95, take exit 150 to Joplin Rd. (VA 619 west). 703-221-4706
Arlington: Arlington National Cemetery, (visitor's center, self-guided walking tours). From Richmond, take Rte. 95 north (do not merge onto the Beltway). Take Rte. 395 toward Washington, D.C., then take exit 8-B to Rte. 27 (left lane). 703-607-8000
Manassas: Manassas National Battle Park, (view the site of the first and second battles of Bull Run. Hiking, fishing, wildlife and bird viewing, auto tours). From Manassas, take Rte. 234 north. 703-361-1339