The largest historic preservation organization in the United States.

The world's largest anatomically accurate brain sculpture.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

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

The bespectacled, cocktail-sipping pachyderm is a strange but fitting liquor store mascot.

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

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

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

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

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

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

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

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

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.

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

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

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.