Check out a new letterbox planted today in Herndon, Virginia.

http://www.mindspring.com/~alberth/lbna/letterboxes.html#cupcake



Clue from this web site:

Runnymede Park is on the North East portion of the Herndon Parkway.
Check out a map. From the toll road, get off on route 7100 North,
then take the Elden exit. At the bottom of the exit ramp, turn left
onto Elden. Turn right onto Herndon Parkway, then right into the
small parking lot at the sign for Runnymede park.