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Photo: Antony-22, CC BY-SA 4.0 via Wikimedia Commons
The site of the Fairfax Stone, marking the source of the North Branch Potomac River. It determines the western boundary of Maryland, as well as one end of the Fairfax Line leading into Northern Virginia. The park is just a small clearing at the end of a road with the stone and a few picnic tables, but if you're a geek for these sorts of things it's worth a selfie.
Fairfax Stone Historical Monument State Park is a West Virginia state park commemorating the Fairfax Stone, a surveyor's marker and boundary stone at the source of the North Branch of the Potomac River. The original stone was placed on October 23, 1746, to settle a boundary dispute between Thomas Fairfax, 6th Lord Fairfax of Cameron and the Privy Council of Great Britain concerning the Northern Neck of Virginia. It determined the proprietorship and boundaries of a large tract of mostly unsurveyed land in the British colonies of Maryland and Virginia.
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A row of historic buildings, including an opera house.
At the north end of the valley. Another natural area with trails, managed by the West Virginia Land Trust.
At the northwestern end of the valley. A state-managed area with trails.
The main attraction is the five-story-tall amber-colored waterfall, which is one of the most photographed sites in West Virginia. Lodge with gift shop, indoor pool and on-site restaurant. Camping, hiking, horseback and pony rides, swimming, boating and fishing, cross-country skiing, sledding, and a petting zoo during the summer.