A large collection of motorbikes with some impressive gems.

A 30-foot man on a penny-farthing bicycle rides along the banks of the Mississippi.

The dream home of an iconoclastic renaissance man still stands as a monument to his domestically mundane vision.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

While there are no actual snakes in the history of this crooked road, there may be a number of dead horses.

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

This historic Illinois "Muffler Man" has been converted from axe-touting lumberjack to rocket-wielding space ace.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

A mini Wrigley Field for mini baseball players.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Former hotel turned into haunted playground.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

This family driveway also serves as the highest point in Illinois.

A river with some unusual, and occasionally dangerous, habits.

The remains of a Rockefeller's lush Italianate estate hidden in the underbrush on the coast of Lake Michigan.