This small shop walked so America could run on Dunkin'.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

Each of these hand-painted wooden boxes, which date to between the 16th and 19th centuries, contains a genuine human skull.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

This eclectic collection documents the wild legacies of "America's Wickedest Street."

One of the oldest brick structures in Freetown.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

Legend has it that any woman who kissed this statue would soon be married.

In a divided Germany, Potsdam's "central" train station was relocated to the city's southern suburbs to avoid West Berlin.

Cavemen, elephants, and eagles greet passengers driving through the town's main intersection.

This tremendous timepiece was once the largest cuckoo clock in the world.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

Wander among the abandoned ruins of this once-powerful medieval town.

An ancient burial ground believed to have been used for ritual sacrifice.

This stately Victorian-era burial ground overlooking the Pacific Ocean is home to the graves of some of British Columbia's most famous figures.

The classic Atari game's iconic aliens have invaded downtown San Diego.

Many generations of travelers have passed through the steep, smooth walls of this canyon.

Learn to make this village's specialty: volcanic mud tofu.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Hidden along this old street in Antwerp is a surreal monument of a bronze arm sprouting four hands.

Abandoned hotel with adjacent lake and golf course.