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

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

Walk through the history of American pop culture.

A priceless collection of the Nation's cryptologic history.

This free, take-a-book shop seems like a trick but isn't.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Remnants of a storybook amusement park hidden behind a strip mall.

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