Forever immortalized in concrete, this Simpsons etching was crafted by show creator Matt Groening.

The ornate structure is part of a building boasting more marble than the Vatican.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A collection of biblical memorabilia.

A public urinal so pretty, it was declared a national monument.

This basement museum explores the art and artistry of fascism.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This sprawling Jewish cemetery is one of the largest in Europe.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

Tiny memorials honor individual victims of the Holocaust.

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

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

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

A 12th-century fortress containing some of Berlin's oldest buildings.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

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

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

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

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

A fascinating insight into daily life in the Eastern Bloc.

A wunderkammer of mysterious objects and stories.

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