The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Follow the steps, and this roadside artwork will teach you how to dance.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

This structure among the trees was the result of divine inspiration.

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

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

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

The world's longest known cave system.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

Located inside a former bread factory, this museum explores a century of transportation history through innovations that were extraordinary or failures—sometimes both.

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

This replica of the Greek structure is in the heart of Nashville.

For decades these polar bears have roamed all around a Nashville neighborhood.

Massive still life just off the highway in Kansas.

A 20-foot-tall egg painted in a traditional Czech patterns by the Czech community in Wilson, Kansas.

A museum where visitors can learn about greyhounds and (more importantly) pet them.

Less a museum than a bizarre fantasy world created by artists and engineers.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.