Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Once one of the largest producers of pig iron in the world.

The highest bridge in America was built for an almost unnervingly small amount of money.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

An obsolete, vanishing traffic device warns Cincinnati drivers away from middle-of-the-road obstructions.

An art deco ice cream shop covered in vintage tiles.

Where beautiful signs live on forever.

If astronomy had a ghost, it would look like this observatory.

The world's largest anatomically accurate brain sculpture.

Tucked away in the forests of Indiana resides an abandoned waterslide that is now a popular graffiti haunt.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

Dinosaurs invade a suburban Nashville neighborhood.

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

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

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

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Hidden amid a collection of trails is the site of a tragic crash.

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

A psychological self-portrait in the form of a giant, segmented head.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

These eerie outliers of the lightning bug family glow a mysterious blue color.