The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Eighty million natural history specimens call this gargantuan museum home.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This fountain was designed to honor the man who helped bring water to Barcelona.

On the wall of this medieval square, a symbol of the Spanish Inquisition.

Turntable anonymously received orphans, alms, and groceries.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

Incredible labyrinth of man made caves.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Berlin's old airport.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

One of the world's heaviest musical instruments towers within a popular urban park.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

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

Cold war icon and onetime "hole" in the iron curtain.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A fascinating insight into daily life in the Eastern Bloc.

This monumental work of art symbolizes the coming together of a previously divided city.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.