A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

One of Philadelphia's largest murals resides hidden under this bridge.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

No one knows who painted this mysterious mural in a Penn State basement.

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

These lush botanical gardens employ the most purrfect pest control force.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

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

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

A museum and research center dedicated to preserving the history of Rolls-Royce and Bentley motorcars.

A legendary boxing venue and ring featured in Rocky V.

For decades, it has disappeared and reappeared as water levels rise and fall.

A daily replay of the experiment that proved the rotation of the Earth.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

Pennsylvanian mass grave and possibly mass murder.

There aren't too many operational funiculars around, but Pittsburgh has two!

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

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

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