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

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

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

A beautiful oddities shop crammed with strange and morbid curiosities.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

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

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

A decaying building marks the site associated with Emmett Till's brutal 1955 murder, which helped sparking the civil rights movement.

This roadside attraction in the woods of Mississippi is a scalable replica of the Holy Lands during biblical times.

A dramatically eroding canyon thousands of miles from the desert.

This monument to the victims of a tragic explosion is said to turn and look at passing cars.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

Walk through row upon row of manicured miniature trees at the United States' largest bonsai nursery.

Built following the War of 1812, this fort has withstood hurricanes for centuries.

Giant novelty guitars now mark the spot where Robert Johnson is said to have sold his soul to the devil.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

An eerie and beautiful group of columns mark the site of a grand mansion lost to time and fire.

The largest collection of ornamental hair combs on the planet.