This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Elevated freight railway turned wildly successful urban park.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The oldest operating pharmacy in the world features 800-year-old recipes.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

World's largest Christmas store.

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

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

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

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

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

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

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

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.