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

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 oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This tiny museum's sizable collection is jammed into a former underground public toilet.

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

A charmingly eccentric magma chaser presents his complete history of the island's eruptions since 1947, in cinematic form, just for you.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

One of the oldest amusement rides in existence was a huge disappointment to its creator.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

This tiny island is home to the world's largest colony of Northern gannets.

Museum celebrating the history of computers, especially their role in codebreaking.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

A retirement home for soldiers that can trace its history to the Elizabethan era and beyond.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

This charming railway is one of the oldest and steepest funiculars in England.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.