Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

This pun was simply waiting to come to life, and one defense contractor made it so.

Where pardoned turkeys once spent their all-too-brief final days.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

These unusual rooms on wheels are holdovers from the 1960s.

Named for a Greek oracle that interpreted the words of Zeus, this beautifully-restored manor home was once home to the architect of the Marshall Plan.

The only U.S. Senator to die on the field of battle is buried in San Francisco but memorialized at Balls Bluff Regional Park.

This former Cold War missile control site played an important role in the creation of GPS.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

The site of the one and only battle of Lord Dunmore's War.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

The last vestige of a once substantial orchard and farm in the suburbs of Northern Virginia.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

This golf ball–shaped former desert real estate office now houses a UFO museum.