Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

Fortified homes of highland warriors that are still in use today.

The palace of the King of Kings, burned by Alexander the Great.

Burial site of a Jewish prophet revered in Iran.

Named after a legendary garden called Eram in southern Arabia, built by order of Shaddad, an Arab king who wanted to compete with Paradise.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

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

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

Seattle's own bad art museum located inside Cafe Racer.

A walk through the historic city center, under the streets of Seattle.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A wall of chewing gum moonlights as collective art.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

Macabre astrological automaton clock dating to the late 1400s.

An abstract monument to a symphonic composer.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Home to three historic ships from the age of Vikings.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Mysterious lost empire of the Silk Road.

The largest hewn stone in history.