Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Fortified medieval tower house with lovely roof garden.

The oldest operating pharmacy in the world features 800-year-old recipes.

An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

Inside this mansion turned museum, the works of prominent Croatian artists are on full display.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A section of the long chain that blocked enemy ships from entering Constantinople.

Turkish adventurer antiques in the heart of the Grand Bazaar.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

A marvel of Byzantine engineering under the streets of Istanbul.

The building is a gigantic piece of art inspired by the shape of a desert rose.

The enormous diamond-shaped building packs a trove of academic and literary treasures into one futuristic space.

Qatar's oldest market can trace its origins back more than a century.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

Tile mosaics and quotes from Pablo Picasso add an artistic flair to these bus stop benches.

A mother's mourning for her lost son is remembered in this small park embedded with his memory.