This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Perhaps the most scandalous statue of America's first president.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The 28,000-year-old specimen is remarkably intact.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The land is home to swimming ponies and a legendary 18th-century treasure.

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

How this Pine Barrens hill got its name is uncertain, but on a good day the view from the fire tower is crystal clear.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This dramatic rail curve was once the target of a failed Nazi attack.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

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

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

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

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

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

"Where the ducks walk on fish."

A toxic ghost town sitting atop a massive coal fire.