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

You thought Santa Claus didn't exist, but it turns out you were wrong.

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

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

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

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

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

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

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.

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.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

A modern-day wunderkammer dedicated to Indianapolis history, Afrofuturism, and musical vibrations.

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

The first spinning jail built in the United States is the only one that still turns.

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

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

Symbolic attempt to overcome the issues of life.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A medical facility that has been kept frozen in time.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.