The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

There's more contention than one might expect from cherry pie pans.

Full-sized barn houses many restored instruments.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

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

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

World's largest Christmas store.

Former self-sufficient mental institution now a planned community.

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.

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

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

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

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

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

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A community of collapsing homes more than a mile out from the Florida coast.

An abandoned water sports stadium that has become a haven for graffiti and decay.

Former villa and estate of James Deering developed to preserve native tropical forests.