This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

The world's longest known cave system.

Prehistoric animals decorate this popular outdoor park.

A tribute to a 13-year-old boy who was kidnapped in 1793 and escaped over two years later.

A chapel built by Italian POWs during World War II tells a forgotten tale of the war on the home front.

Both funky and traditional, it's the oldest of its kind in Indiana.

A wartime promise becomes a shrine to Our Lady of Lourdes.

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.

One tree's homage to soles past and present.

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

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

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

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

This mysterious hill seems to pull objects uphill.

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

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

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.

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.

European castle ruins in an American state park are actually the product of death and grief.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.