These rustic holiday homes are made from discarded fishing boat hulls.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

A modern reimagining of a medieval city gate.

Four giant movable street lights decorate this modern Rotterdam square.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Most prolific publishing house in the 1600s open to the public.

This historical Netherlands fortress still bears the marks of its single siege.

A luxury hotel housed in a former 15th century Gothic church.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

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

This mysterious pig iron pillar does not rust, despite being weathered by the elements for centuries.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Elaborate tile work in this railway station tells the story of Portugal.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Thousands of flowers create enchanting pink tunnels over the city streets.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

The world's oldest bookshop still in operation.

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

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.