Twisted buildings adorn the banks of the Rhine river.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

The last gas-lit cinema in the United Kingdom, and perhaps the world.

A shrine to one of England's female saints in what is believed to be her former home.

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

Catacombs turned marketplace.

A haunting collection of the vanished and disappearing natural world.

Reminders of the Battle of Berlin still scar the railway.

A monument to the man who almost killed Hitler.

One of downtown Berlin's last reminders of its Communist past.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

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

A tribute shrine where the Space Invasion street art movement started.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

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

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

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

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

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

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

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