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

Where commuters walk through remnants of an ancient Greek necropolis.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A sharp sculpture made of thousands of pieces of jagged glass.

An ancient octagonal weather station named for the eight Greek gods of wind.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

A Museum of Psychiatry in a still-operating mental institution.

This magnificent church allows travelers along one of Germany's busiest roadways a chance to rest and reflect.

This smily stone feline is meant to represent a mythical lion that almost destroyed the island of Kea.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

It's good luck to be mocked by this monkey.