The world's longest known cave system.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

A comedy troupe's collection of bizarre humor.

The park is home to the United States's only still-operating Dutch windmill.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

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

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.

Former self-sufficient mental institution now a planned community.

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

One man's attempt to create an artistic wonder on a run-down block in Detroit.

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

Purdue students would lean over this iron fence to skirt campus rules against smoking and courting.

Historians and hobbyists head to this former French outpost for the annual Feast of the Hunters' Moon.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

A concrete block embedded with thousands of pulled teeth was created by a local dentist to memorialize his dog.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

Hot Doug's "Hot Dog" Stand.

The palatial McDonald's that inspired Wesley Willis.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

Partially submerged Buddha heads freckle Chicago’s neighborhoods.

Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.