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

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

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

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

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

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

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

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

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

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

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

This mysterious hill seems to pull objects uphill.

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

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

If astronomy had a ghost, it would look like this observatory.

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 giant concrete egg marks this Indiana town as the "Egg Basket of the Midwest."

This remote eatery and museum is preserved as a time capsule of a small Icelandic fishing town.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

This Chinese museum proves that it's a watermelon world, we're all just living in it.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

A museum has some wedding cake dating to the Teddy Roosevelt administration, and some bacon from FDR's.

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.