Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Europe's official "zero-level," the equator of elevation.

Amsterdam's former hotspot for public executions and dissections.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This cheese shop also houses a museum devoted to Dutch dairy.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The history and future of cannabis.

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

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Cat art as far as the eye can see.

A floating cat sanctuary on an Amsterdam canal.

The burial ground of two kings and a queen is now a calm city park in the middle of bustling Seoul.

The site of the last royal wedding in Korea.

The supreme shrine of the state.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

Step into a cartoon at this Seoul café that aims to evoke a two-dimensional scene.

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

The former Willingdon Airport started operations in 1929, in India's capital, Delhi. Now, it's used for maintenance runs and helicopter rides.