Rebuilt remains of a temple to Roman god Mithras.

The curios of pharmacist and collector Henry Wellcome.

A hands-off space for graffiti artists to hone and display their skills.

Northern Ireland's Brobdingnagian stepping stones.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Famously misunderstood wonder of the ancient world

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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

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

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Religious structure known for its sculpted details.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

Legendary site where an evil bishop was devoured by rodents.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A former ironworks that was the first UNESCO industrial site.

A stairway to heaven, or to nowhere at all.

In this truly magical place, rent hasn't been raised since the year 1520.

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

Go surfing on this urban wave, "hacked" by local surfers.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.