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

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

A nourishing complex of found object art, paintings, and sculptures that celebrate key figures in Black history.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

Marine fossils from the Devonian period are exposed at this park.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

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

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

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

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

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

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

This former fire tower found new life as a communications hub complete with a scenic overlook.

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

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

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

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

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

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.