An incredibly durable timepiece glows beneath shoppers' feet.

On this Polish road, an optical illusion makes cars seem to roll uphill.

This fairytale medieval church in Poland originally spent centuries in Norway.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

This misspelled graffiti reappears every time it is removed.

A 246-foot-high revolving restaurant rises unexpectedly from a forested Finnish hilltop.

The last permanent exhibit dedicated to the Soviet leader.

The church's remarkable frescoes incorporate Finnish artist Hugh Simberg's trademark themes of death and the supernatural.

Every summer, an open-air swimming pool appears at the base of a Finnish city's beloved winter attraction.

A small island dotted with old, historic Finnish buildings.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

Finland's oldest astronomical observatory once played a crucial role in seafaring and timekeeping.

This church also serves as a lighthouse complete with a beacon.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This restaurant combines two Finnish traditions in one place: warm-weather relaxation and outdoor carpet-cleaning.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.