The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

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

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

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

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

A toxic ghost town sitting atop a massive coal fire.

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

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

One of the ghostly stops along Route 66.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

An inconspicuous footbridge beloved by San Diego locals.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.