This former mill tunnel was blasted under the ridge to divert a portion of the Muscatatuck River.

The world's largest anatomically accurate brain sculpture.

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

The largest historic preservation organization in the United States.

The only freestanding table rock formation east of the Mississippi.

A historic hotel library in Indiana hides more than a few secrets on its shelves.

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

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

A collection of over 2000 air-moving devices of all kinds displayed in the Fanimation headquarters.

In a city crazy for seashells this museum educates and amazes visitors using the wonder of cast-off exoskeletons.

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

Moonbows over Kentucky.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

Home of the International Space Hall of Fame.

More than 21,000 images fill this overlooked gem of a prehistoric site.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

One of the American Southwest's most extensive collections of Navajo rock art.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."