A medical facility that has been kept frozen in time.

A museum preserving one company’s history of preserving food.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

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

A local scoured more than 1,000 acres for stone to create his masterpiece.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

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

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

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

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