Notes:

22HC+89 Pine Acres, Virginia

Exact coordinates are 39.028368, -77.979080 (WGS84).

This address points to a very large plot, and mapping software may point to a location that is correct but not near the actual diner. By more conventional reckoning, the diner is off the north side of the highway, about a third of a mile south of the junction with Rt. 606. [Thanks to Spencer Stewart]

But for a few details that give it away, this handmade diner is fair imitation of the barrel-roof style, and likely dates from the period.