Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

Enter the cabin of a life-sized Hindenburg replica.

Visitors may notice something strange walking through this quaint German town.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A portrayal of two lamps embraced and in love.

The first passenger cable car in the world.

A strange-looking 18th-century tower sits on a tiny islet just off Livorno.

Perched above a grotto, this tribute to Mother Nature looks out into the ocean.

This Tuscan church contains a gallery of over 700 ex-votos depicting near-death experiences.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

This deceiving white sand beach gets its brilliant hue from the chemical discharge of a nearby factory.

These unique "earth pyramid" clay columns can be found in ravines around the village of Tirolo.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

The people of Padua pledged to construct this church if the city was spared from destruction during World War I.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

These elaborate gothic monuments honor Verona's medieval lords.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

The city of Parma's cathedral is home to one of the greatest illusionistic frescoes of the Renaissance.

A massive mausoleum towers over the gravestones in a 19th-century Italian "model village."