The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

This unique historical monument features large concrete spheres designed to resemble fallen stars.

At 207 feet, one of the world's longest continuous escalators.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The most accurate timepiece in the world.

Art deco landmark on the outskirts of Washington, D.C.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The site of the climactic scene from the classic horror film is now a historic landmark.

The site of one of history's most indelible and horrific tragedies.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A unusual sanctuary for abused and exotic animals in South Jersey.

Memorial built in 1922 in remembrance of WWI casualties.

Yo, Adrian!

The United States Capitol's former columns still stand.