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

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Crumbling hotel echoes with the sounds of the '30s.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This soda factory is one of the last in America to use real cane sugar despite the protestations of Dr Pepper.

The second oldest continuously operating bar in Louisiana.

The Grand Canyon of Texas.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A starship has landed in Texas, a welcome break for weary travelers from a drab stretch of I-35.

A modernist landscape of water and sci-fi concrete.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.