The world's largest collection of mechanical puzzles is a cornucopia of analog bafflers.

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

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

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

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

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

A humble homemade ride attracts visitors from around the globe to this small Midwestern town.

One-layer pyramid in Indiana.

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

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.

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

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

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

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

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

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

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

Symbolic attempt to overcome the issues of life.

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

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.