An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

Monasteries on rock pillars, once accessible only by frayed ropes.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

This ancient theater was once the home of fierce gladiatorial battles.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Largest illuminated advertisement sign in the world.

This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.

This giant, 83-year-old ship elevator is an engineering feat to behold.

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

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

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.

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

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

This 600-year-old home seems to defy physics.

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

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

The "Prussian Versailles" that is as glorious today as when it was built.

The prototype for all Nazi concentration camps.

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