The national park was once a plantation estate.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

A derelict bit of transportation infrastructure hidden in the woods.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

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

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

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

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

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

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

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

Bizarre Cavern.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

The whole world in one water tank.

This abandoned Victorian-style house was built in 1884.