This Elizabethan hedge maze is one of only six in North America.

A historic coal mine that doubles as a museum and tourist attraction.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

America's post-nuclear-attack chambers of Congress.

Home to items never before seen by the public.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Memorializing an American tragedy of massive proportions.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Advice-columnist's bell tower, paid for with pennies.

A Northwoods sporting competition that shows lumber jacks doing much more than cutting down trees.

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

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

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."

Astounding collection of coin-operated games and automata.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

Symbolic attempt to overcome the issues of life.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

A lush green oasis in the middle of Chicago.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.