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

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

This abandoned Victorian-style house was built in 1884.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This abandoned sea fort has become an accidental bird sanctuary.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

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

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

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

Bizarre Cavern.

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

An abandoned church gets a second life as a massive beer hall and event space.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

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

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

Ship skeletons haunt Baltimore's waterways.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

The abandoned coal loading dock is a canvas for unsanctioned art.