You'll find the little birds tucked within the rocks of this Australian beach.

This viaduct serves as a reminder of World War II.

The old castle kitchen where nucleic acid was first isolated is considered the "cradle of biochemistry."

The scars of World War II are preserved on its walls.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

For centuries, Germans have been dancing in trees.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

This ancient oak tree plays matchmaker for singles willing to branch out from the usual dating scene.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

The narrowest street in the world is in danger of closing up entirely.

This old wooden funicular railway leads to a cemetery in the forest.

The world's biggest pet store.

An old slaughterhouse now holds the largest collection of pig artifacts.

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

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

The largest brick bridge in the world.

This riverside restaurant has been serving customers since 1146.

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

This lurid German fountain plots the sad course of marriage from dating to death.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

A fearsome dragon clings to a corner of Munich's city hall.

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

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.