This century-old roadside attraction is full of bizarre rock formations.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This restaurant serves wood-fired fare served in a natural cave with a live spring.

A dark, narrow tunnel that leads to a charming lake and waterfall.

The largest spring in Northwest Arkansas is also home to a sprawling botanical gardens and a historically significant bluff.

The ruins of a resort and casino sit on the banks of this blue hole spring that pumps 70,000 gallons of warm, clear water every minute.

A farm turned upside down.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.