Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

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

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

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.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Three small rooms at the back of the “official” church of London's clowns.

A mineral spring that became all the rage in 17th-century England.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

This pub boasts a curious history and may have inspired a Dickens character.

London's first edible insect farm offers facility tours and cooking classes.

The plunge pool is a surviving relic of a rowdy royal residence.

This London marker celebrates the spot where the world-famous English band was founded.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

This 19th-century pub features stained-glass windows celebrating Victorian-era "champions."

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

A friendly pub with a sordid past in cock fighting.

Ship-sized kinetic sculptural fantasy.