A small square plaque marks a failed assassination attempt that could have changed history.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Old Danish castle immortalized in Shakespeare's Hamlet.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The amazing wonder cabinets of a very rich Austrian archbishop.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

A small alleyway lined with locally drawn scenes of nostalgic anime and cartoon characters.

A small hippo-shaped fountain in Berlin, Germany.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.

In the summer of 1957, a massive architectural exhibition showed off the future of urban living in this German neighborhood.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

Superb sweets await at the first Jewish bakery inducted into Berlin’s prestigious baker’s guild.

This public observatory is home to the "celestial cannon," the longest pointable telescope in the world.

The best bagels in Berlin are tucked away in an independent bookstore.

For more than 170 years, this family-run bakery has been serving Berlin’s best Baumkuchen, or “tree cake.”

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Where once there was a train station bathroom, there is now this German burger joint.

A thriving community of Taiwanese art.

Only through deep darkness and tragedy did this elaborate royal palace become a sacred temple.

The tangled roots of a giant banyan tree have fully reclaimed the ruins of this abandoned warehouse.

This collection of lakeside pagodas and temples are flanked by giant lions, tigers, and dragons as well as their welcoming maws.