Legends surround an ancient tree trunk riddled with nails for good luck.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

The only arched bridge made of stone on the entire Mississippi River.

Enter the Forest of the Elves.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

World War II-era Nazi compound nestled in the Santa Monica hills.

A huge musical instrument played by the ocean.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

Once a purveyor of Santeria supplies, religious products , and household sundries, now closed.

The Uros people live on floating reed islands in lake Titicaca.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Death rituals and sacrifice inside a Peruvian megalith.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.