Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

There's something in the air as history repeats itself at this museum dedicated to the Swedish pop band.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

The castle still holds traces of the abandoned Roman fort it was built atop.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

A spectacular Neoclassical palace is home more than 15,000 artifacts and works of art.

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

A pair of connected skyscrapers form this symbolic gateway.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Romania's triumphal arch looks out over Bucharest.

A giant portrait of an ancient king looms over the river.

Eat the ultimate iteration of Portugal's most beloved pastry.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

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

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A remote Arctic museum focusing on the science of icebergs and the archaeology of an ancient Inuit settlement which lies just outside its doors.

Greenland's first shopping mall also hosts the country's government.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.