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

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

The unexpectedly beloved remnants of a controversial thermal power plant.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

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

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

A stunning medieval castle houses this eclectic, interactive tribute to all things wine.

Famous landmarks and structures from across Italy fill this miniature park.

Da Vinci's equestrian statue, 500 years in the making.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.