A beautiful but toxic fountain of mercury.

Turntable anonymously received orphans, alms, and groceries.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

One of Europe's largest supercomputers is housed inside of a disused chapel.

This semi-secret storybook hedge maze is also the oldest garden in the city.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

This cemetery features modernist statues as strange as its name.

Described as "the world's most blinging pool."

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

This exacting restaurant will charge a fine for every grain of rice you've left behind.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

Research station devoted to mysterious floating lights seen in a Norwegian valley.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

Medicinal spa created with the discharge from a geothermal energy plant.