Steepest flood safety railway in the entire world.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

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

Memorializing an American tragedy of massive proportions.

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

The spectacular collection of one of the world's best woodcarvers.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Pennsylvania's own Roswell-style UFO mystery.

This church in Pittsburgh is home to the largest collection of religious relics in North America.