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

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

An abstract representation of weather in Sweden.

These airport hangars are now a bustling shopping center with only hints of its past still lingering.

A concrete mushroom that divided Stockholm residents for nearly a century.

A heated statue pays tribute to one of Sweden's great actresses.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

Sweden's oldest animated sign is still lighting up the skyline today.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Every Tuesday, students let off steam by screaming into the night air.

A Japanese video game arcade hides in the back of a Swedish pool hall.

"Only the dead get off at Kymlinge."

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

A man has revenged his true love's betrayal through tears and stone genitalia.

Sweden's "good old days" painstakingly re-created in a model village.

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

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

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

The library's graceful rotunda is like a bibliophile's temple.