A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

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

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A 130-year-old urinal is the oldest of Stockholm and perhaps all of Sweden.

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

An ancient Viking runestone hidden in plain view in Stockholm's old town.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Pop culture has helped to keep this iconic British building from being destroyed.

This London plaque marks the spot where David Bowie's famous alien made his debut.

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

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

The most loyal of little dogs, or a Victorian era publicity stunt?

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

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

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Fantastic collection celebrating the final send-off.