This little-known national museum houses over 40,000 works of art from across the world.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

An art installation memorializing a tram stop, which became a tram stop.

Inside this metro station is a section of the city's former medieval fortification.

An icon of International Style architecture on the outskirts of Rotterdam.

These lights mark the area of Rotterdam that was bombed and burned in 1940.

The Netherlands' first car tunnel has an unusually rectangular shape.

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

A huge teapot illuminates a home for the elderly.

A modern reimagining of a medieval city gate.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

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

A dramatic art installation features a BMW flying out of a building in Rotterdam.

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

This secret garden has bloomed into London's most unique hub of urban creativity.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Detailed facade of a brownstone in Boerum Hill.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

Sniff the Titan Arum's rotting flesh.

Elevated freight railway turned wildly successful urban park.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.