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

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.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

World's largest Christmas store.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

This Mediterranean castle was built for a millionaire and his giant dog.

This historic hotel invented the chocolate brownie.

An enormous park-like oasis, full of famous Chicagoans' graves.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

Robots, lasers, and whoopee cushions, oh my!

Minnesota's oldest and deepest mine is now an underground physics laboratory.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

This massive roadside mascot was the first version of the giant to illustrate his butt.

A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.

The only arched bridge made of stone on the entire Mississippi River.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A winged-helmed, sword-brandishing tribute to German Americans.