A domino effect created with Britain’s iconic telephone boxes.

Though it's not the largest, this one-kilometer outdoor market is reportedly the longest in Europe.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Abstract dinosaur models in London.

A little slice of Japan and its aesthetics in London's Holland Park.

A student driver's nightmare.

Eighty million natural history specimens call this gargantuan museum home.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Bacteria and algae give the salty water its bubblegum hue.

Wonderland replication in progress by one persistent man.

The Pope’s secret escape route.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

The secret medieval communication system will whisk your words above the noise of the crowd.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

This cemetery features modernist statues as strange as its name.