This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

Real bones which are said to have belonged to a Polish dragon.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

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

A unique seaside cave where Aleister Crowley faked his own death.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

Home to three historic ships from the age of Vikings.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

A fascinating insight into daily life in the Eastern Bloc.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.