Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

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

Brain collection and database that narrows the gap between man and animal.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

An eerie, decaying ghost town destined to fade into the forest.

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

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

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

Ship skeletons haunt Baltimore's waterways.

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

This former asylum for Black Americans is haunted by its history of violence and racism.

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

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

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

This suburban house is made of dirt, and almost sparked a revolution in home construction.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

The "lovely red Vega" of the legendary record-settling pilot.

The oldest continuously operating fish market in the United States.

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

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.