A massive underwater sinkhole made famous by Jacques Cousteau.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A church of bones, decorated with 40,000 human skeletons.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

At HopCat, a marker honors fictional creatures with the ability to travel the missing dimensions of Kcymaerxthaere.

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

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Former self-sufficient mental institution now a planned community.

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

Trade in that pesky human soul for cold-hard circuits.

Strange physical sensations and optical contradictions keep visitors coming back for more.

The only surviving prototype for Buckminster Fuller's house of the future.

A Beaux-Arts triumph set to become Ford's innovation campus

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

Astounding collection of coin-operated games and automata.

The bones of an old zoo crumbling in the shadow of a new one.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.