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 stretch of highway, deteriorating next to the operational one.

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

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

A unique sculpture park that specializes in the huge and bizarre.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

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

See wolves, coyotes, and arctic foxes in a natural environment smack in the middle of New York State.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

The quarry was abandoned over 100 years ago, after a massive ammunition explosion ended in tragedy.

Why have you never heard of the second most popular tourist site in New York?

This geothermal hot spring hides beneath a slowly growing mineral dome.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A ghost town that held steady longer than most, but finally gave up the ghost.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A recently abandoned psych ward at the end of Sanatorium Road.

Ruins of a historic medical facility sits eerily by the water.