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

This giant disembodied horse head seems to balance impossibly on its nose.

The ruined remains of a coal mining ghost town are hidden within the woods.

These disused steel furnaces are now haunting ruins that may one day be a national park.

This public space is speckled with the eerie remnants of a defunct amusement park.

This secluded walking trail is a hidden gem of a Pittsburgh park.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

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

A toxic ghost town sitting atop a massive coal fire.

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

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

Inside a state forest, the forgotten remains of a Cold War defensive installation.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.

A unique, eye-catching statue that carries an important message of hope.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

The remains of what was, not so long ago, the world's largest city.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

An important Mayan religious and trading center dating back to 200 BC.

A massive underwater sinkhole made famous by Jacques Cousteau.

A wooden statue of an Estonian pagan god and King of the Setos stands atop a sacred hill.