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

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

The largest earthwork effigy in the world.

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

In an alley not far from where two great highways meet, byways of a very different sort are honored.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

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

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Mile-long cave system near Great Smoky Mountains.

Replica of an old Esso filling station, complete with Wayne gravity pump and outhouse.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Prehistoric animals decorate this popular outdoor park.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

This replica of the Greek structure is in the heart of Nashville.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

To find the "unicorns of the deep" you've got to go downstairs.

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

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A display of magnificent stained glass windows is the first exhibit of its kind.

A lush green oasis in the middle of Chicago.

This former Indiana quarry has been transformed into a park and SCUBA site where divers can explore the drowned mining equipment.

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