Jule Körner's house full of bizarre architectural details.

This nine-story building can be played like an instrument.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

The site of a tragic massacre that spawned a multimedia franchise.

Avoid gangster interaction while window-shopping.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

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.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

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

The oldest farmer's market in America is so ancient it was approved by the King of England.

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

This little museum in the town where zombies were born celebrates the living dead.

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

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

The site of the one and only battle of Lord Dunmore's War.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

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

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.