A local prank turned town icon.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

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

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

This haunting monument honors the victims of 9/11.

Here, exhibits come with a side of edible history.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Ride the subways of yesteryear.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

Largest Roman Catholic church in North America.

The third-tallest lighthouse in the United States stands as a reminder of Atlantic City's early days.

One of the oldest surviving bars in the United States, located at the site of the last skirmish of the American Revolution.

On the Hudson resides one of the largest clocks in the world.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.