Hans Christian Andersen for the postmodern world.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

Sweden's first electric elevator remains hidden within a fortress-like building.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

A wooden street sign is the last remnant of this 400-year-old alleyway.

Stockholm's last remaining paternoster elevator.

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

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

"Only the dead get off at Kymlinge."

Frequent fliers welcome in this airplane hotel.

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

It's always game time at Stockholm's only museum devoted solely to video games.

Early habitat dioramas and home of the elusive gaff, the skvader.

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

This Stockholm light tower can be controlled by anyone with a smartphone.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Whether you're up or down, the Elevator Museum is worth a stop.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

A huge resale shop for the cast-offs of the film & television industry.

Three-story slide through the New Museum.