This shallow cave got its name from copious amount of human bones found inside.

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

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

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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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

Astounding collection of coin-operated games and automata.

World's largest Christmas store.

With over 5,000 champions, the Hall of Fame continues to draw amateur eaters.

This observatory comes complete with three separate telescopes and a dedicated community of amateur and expert astronomers.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

The museum moved on, but the diorama remain.

These sprawling mines once served as a source of plaster and today serve as a storage facility.

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