The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

A daily replay of the experiment that proved the rotation of the Earth.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

A museum that dives into Sweden’s maritime past through preserved shipwrecks and interactive exhibits.

There are hidden patterns on the subway seats of some Stockholm metro cars.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's narrowest alley is barely over two feet wide.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Once a meeting point for great thinkers, and the midpoint of the country.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Copenhagen's celebrated theme park and gardens.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The last bastion of Roman presence north of the Alps looms over a German town.

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