The eerie ruins of a remote abandoned hamlet said to be founded by the survivors of a shipwreck.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The skeletal white beams stand as a monument to religious dissent.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

The only place for a truly presidential dram.

The well-preserved remnants of a bridge that once made up a WW1-era military railroad.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

There's a crumbling old mansion inside the Smithsonian National Zoo.

An Industrial Revolution-era public work that purified water using nothing but sand.

A derelict bit of transportation infrastructure hidden in the woods.

A historic ruin just 20 feet away from a busy highway onramp.

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

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

A portal into the bricked up canal that runs through the heart of Washington D.C.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The United States Capitol's former columns still stand.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.