The narrowest street in the world is in danger of closing up entirely.

A brutalist gem towering over the heart of Milan.

The mark of the Devil's horns on a marble column in Milan.

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.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

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

This old wooden funicular railway leads to a cemetery in the forest.

Macabre astrological automaton clock dating to the late 1400s.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

An early 20th-century bullring converted into a modern shopping center.

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

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Tiny memorials honor individual victims of the Holocaust.

A striking 12th-century-style castle built on the edge of a cliff.

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