After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

Metro station with a claim to rock n' roll fame.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Tiny memorials honor individual victims of the Holocaust.

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

Terrifying derelict military hospital once housed a recuperating Hitler.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Berlin's old airport.

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

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

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

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

An abandoned NSA listening post on Berlin's "Devil's Mountain."

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

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

A 15th-century park that recreates a bit of the Holy Land in Italy.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

The Cathedral of St. Ambrose has been hiding a special parishioner within its walls.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A brutalist gem towering over the heart of Milan.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.