The celebrated eyesore created by starry-eyed sweethearts.

Paris' linguistic guide to the international language of, yes, love.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

The oldest stone house in Paris was built by its most famous alchemist.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An electrical pylon under whose legs a normal gauge train can run.

Fantastic views and thousands of love locks.

This futuristic German television spire is actually the world's largest digital clock.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Carved fountains poignantly placed in parks and in front of special monuments.

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

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

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Twisted buildings adorn the banks of the Rhine river.

The last bastion of Roman presence north of the Alps looms over a German town.

A restaurant and observation deck built in a unique broadcasting antenna.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

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

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

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

This "floating railway" is one of the world's oldest monorail systems.

The most visited, and possibly most controversial, museum in Germany.

A collection of biblical memorabilia.