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

Mysterious rocks that ring musically when struck.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

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

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A layered tribute to the work of mosaicist Isaiah Zagar.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Odd outsider art installations surround a Gold Rush-era ghost town.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

An abandoned castle owned and ignored by Masons carries a cursed history.

The bones of an old zoo crumbling in the shadow of a new one.

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

This abandoned amusement park was built on a site with a dark history.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

Once America's longest-manned military fort, now an abandoned hulk.