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

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

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

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

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

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.

Symbolic attempt to overcome the issues of life.

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

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.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

The largest historic preservation organization in the United States.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

Nature and art meet in this curvy creation

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

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

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

The oldest brick house in the state of Ohio.

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

Historical structures and natural wonders await visitors to this preserve.

A suspended garden, now gone, once hung in the middle of this abandoned church.

An abandoned relic of the city's failed experiment with below ground transit.