The brainchild of Eleanor Roosevelt, her "Little Village" was a collectivist dream.

This university transit system is a 1970's vision of the future.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

This colonial mansion has been home to a staggering number of American historic figures.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

The oldest surviving botanic garden in the United States.

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

A failed piece of Orientalism has become the proud symbol of a community.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

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

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

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

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

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

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

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Destructive children, start your engines.

Marie told fortunes from her small stand on the Boardwalk for decades, including to a young Bruce Springsteen who would busk outside her booth.

A unusual sanctuary for abused and exotic animals in South Jersey.