The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A unique gallery chronicles the losers of American presidential history.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

A small burial plot formerly stranded in the middle of a road.

Population: 1.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

What do a giraffe, an elephant, and reasonably priced steaks have in common? This roadside restaurant filled with exotic taxidermy.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

The largest source of fossilized insects anywhere.

See six states, pickled freaks, rocks, and antiques.

The highest bridge in America was built for an almost unnervingly small amount of money.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The largest self-built castle in the U.S., six decades in the making.

Come for the speed, leave in love with the desert.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The subtle science of a master molecular gastronomist.

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

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.