Fascinating look at a bit of local Fairfax County history:

"P.O. BOX 1142" . . . an ordinary-sounding address for a place that played an extraordinary role during the Second World War. Seth Doane has been digging into its past:

It may seem hard to believe, but an open field in Alexandria, Va. -- a mere 13 miles from Washington, D.C. -- was once a top-secret military site.

Now all that is left are some stories and old pieces of cinderblock.

"It was pretty intentionally wiped clean and gotten rid of," said Brandon Bies, a history buff and National Park Service Ranger, who has spent the last eight years trying to uncover the hidden history of this place.

WATCH: http://www.cbsnews.com/news/memories-of-a-pow-camp-outside-washington-d-c/

A top-secret location in Northern Virginia???????? What are the odds????