An enormous concrete structure built over a nuclear crater.

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

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

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

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

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

This freshwater spring fills with 10,000 gallons of water per minute.

A theme park attraction designed to turn your children into LARPers.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

Home with Gothic windows featured in a famous painting.

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

This simple gravestone remembers a pig who single-hoofedly raised $19,000,000 for the Navy.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

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

In the loving memory of a tragically deceased role-player this Illinois park is decked out with both dungeons and dragons.

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

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

Even with its slightly risible name this colossal cross is still able to inspire awe.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

While he no longer has an eatery to give him context, this off-brand Paul Bunyan still holds his giant hot dog with pride.

The world's largest covered wagon is piloted by a giant Lincoln lawyer.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Moving, mind-blowing metal sculpture work of an outsider artist.