The art museum is decorated with creatively remodeled pre-Nazi swastikas.

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

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

The summer tourists on these cliffs are thousands of seabirds.

Walk in the footsteps of the gods and straddle two tectonic plates.

An encyclopedic collection of mammal penises.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

A collection of weird and wonderful art fills a former houseplant nursery.

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

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A measuring mishap led to these artificial stone ladies losing their stomachs.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The world's oldest family-run magic shop is hidden beneath a bustling London thoroughfare.

The great polar explorer is remembered in this far northern town, where he embarked on his final expedition.

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

The world's northernmost aquarium looks like it has fallen over.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.