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

A larger-than-life statue of America's favorite sundae marks the place it was invented.

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

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

Pluto is still considered a planet in Ithaca, New York.

An office built to look like a giant basket.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

This dramatic rail curve was once the target of a failed Nazi attack.

"Where the ducks walk on fish."

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

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

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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