Iceland's tribute to its thankless civil servants.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.

Three columns of volcanic rock shoot out of the ocean.

This unique building in the main square stands out among the city's typically Baroque architecture.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

The only quarter of the Old City not dedicated to a major world religion.

Morocco's Argania trees are infested with nut-hungry goats.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

Founded in 670, this ancient mosque is an architectural time portal.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

An ancient burial ground believed to have been used for ritual sacrifice.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

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

The largest medical and anatomical collection in France lies hidden from the public.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

Old Tudor home moved on thick iron rails to a new spot.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

These medieval tunnels provided water to the city above through centuries of civil war and plague.

Two women with a flair for both adventure and artful clutter created this singular round home.

Overlooking the spot where the Pilgrims boarded the Mayflower stands Devon's answer to the Colossus of Rhodes.