Macabre astrological automaton clock dating to the late 1400s.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

Former headquarters of the KGB.

Gargantuan home of Russian science.

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

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

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.