Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

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

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

The largest self-built castle in the U.S., six decades in the making.

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

This naturally-sourced hot spring is now home to a clothing-optional resort.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

This abandoned mansion has a window for every day of the year, and is a temple for ghost hunters.

Museum of amazing old toys and automata.

Infamous and now demolished panopticon prison built by its former inhabitants.

If you like Art Deco you will love this bridge.

These ruins are all that remain of Tortosa’s lost coal gas manufacturing industry.

This beloved ancient tree is the pride of this city center.

This technological marvel is one of the world's first 3D-printed bridges.

This magnificent brick dome was made with an unusual design method.

This 15th-century aqueduct with distinctive pointed arches was used for irrigation in the Vinalopó valley.

A site outside Pedraza, Spain where a plaque tells a tale of seven-legged creatures that were said to have once lived in the area—in the fictional world of Kcymaerxthaere.

It's believed these prehistoric individuals were the victims of cannibalism.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

This small Spanish village still pays homage to the Spaghetti Western films that were shot there in the 1960s.

The legendary bathing site of a Moorish queen is actually part of a Roman fish farm.

Fragments of human bones are embedded in the walls of this quaint alley.