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

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

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

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

The United States Capitol's former columns still stand.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

An abandoned stretch of highway, deteriorating next to the operational one.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.