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

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

A memorial to the beloved brown bear that served in the Polish army during World War II.

A brush maker used his factory to protect blind Jews from the Gestapo.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

A monument to the man who almost killed Hitler.

Tiny memorials honor individual victims of the Holocaust.

Puppet theater and museum holding a collection of more than 300.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

A wunderkammer of mysterious objects and stories.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Started as a kitchen garden, now the second largest botanical garden in the world.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

A faded reminder of what was once a common sight in London during the Blitz.

This London marker celebrates the spot where the world-famous English band was founded.

The final resting place of a German diplomat's beloved companion.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

The commemorative stone column conceals a secret laboratory.