66,000 pieces of art, donated by one of the world's richest men.

Frida Kahlo's childhood home, now a museum of her life and works.

Banksy's image of a naked man dangling from the window of a sex health clinic.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

Tiny memorials honor individual victims of the Holocaust.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A fascinating insight into daily life in the Eastern Bloc.

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

The most visited, and possibly most controversial, museum in Germany.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Rare karst landscape eroded from a flat seabed.