Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.

Examine the impact of the horse on Great Plains culture through exhibits on ranching, rodeo, and the Native American way of life.

The first declared National Monument in the United States.

The first spinning jail built in the United States is the only one that still turns.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

The park is home to the United States's only still-operating Dutch windmill.

Miners in Michigan developed a taste for Cornish beef pasties, which this roadside stand has been selling since 1947.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Watch the ships come in on Michigan's 210 ft. high observation deck in Sault Ste. Marie.

This wooden troll marks the starting point for Detroit Lakes' troll scavenger hunt.

This municipal park along the Missouri River honors the galley central to the Lewis & Clark Expedition with a replica ship and sculptures.

The world's largest Holstein cow.

This kitschy curio wonderland is full of fake animals, teak tables, and a cacophony of random bric-a-brac.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

This 25-foot-tall statue was built as a protest to a property dispute.

Home to a 26-foot-tall statue of an American icon.

Almost half-way between the Equator and North Pole.

The center of the only hemisphere that awards visitors with a commemorative coin.

An excursion train traverses a picturesque red-rock canyon along the Verde River.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.