Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

Nature's biggest mammal swims in landlocked Oklahoma.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

Like Mars, but much closer.

A park and memorial dedicated to the victims of the deadliest school massacre in American history.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

In which a local geological marvel becomes a quaint roadside attraction.

A winding district gerrymandered into the shape of a mantis.

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Built by the patriotic residents of Boonsboro in a single day.

The longest navigable underground river in the United States is home to countless blind and albino animals.

The world's largest collection of the world's largest objects is in one small Illinois town.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

What is it about mushrooms that makes people wish they lived inside of them?