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

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

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.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

The last street in Pittsburgh that's paved with wood.

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

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

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

Asheville, North Carolina, was the the second place in the world to enjoy Kentucky Fried Chicken's secret recipe.

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

This bridge is haunted by the ghost of a distraught mother.

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

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

A much-maligned monument to teetotalism.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

This nine-story building is the oldest standing skyscraper in D.C.

This unassuming passageway played a key role in one of the most important events in U.S. history.