Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

This otherworldly church spire reaches up toward the heavens.

The ruins of a 19th century shelter run by the Independent Order of Odd Fellows.

This recently restored timepiece has stood all around Kansas City.

This abandoned prison castle has become an imposing gallery of graffiti art.

See the motorcycles that launched the stuntman to fame and the gear that saved his life.

Massive still life just off the highway in Kansas.

One of few remaining antique carousels with stationary animals in the U.S.

The highest bridge in America was built for an almost unnervingly small amount of money.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

This enigmatic building features numerous architectural styles.