One-layer pyramid in Indiana.

Covered in tens of thousands of coats of paint, this Indiana attraction holds a world record all its own.

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

The home used in just a few seconds of film that came to define the setting of a hit sitcom.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

This unassuming home was once “grand central station” for the Underground Railroad.

This former office building has been transformed into an immersive music venue and art space.

Nature and art meet in this curvy creation

The only freestanding table rock formation east of the Mississippi.

Modeled after the labyrinth in Chartres Cathedral, this small-town Indiana memorial labyrinth sits half a world away.

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

This library and museum is dedicated to the life and literature of the Indianapolis native author.

A rural hall of justice holds the world's only comic book and superhero museum.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

Display that gathers the basic elements of the universe in one convenient location.

Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

Ornate limestone building now filled with geologic specimens, and more.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

One man's vision and a labor of love of many.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

This mysterious hill seems to pull objects uphill.