This Swedish astronomical clock was in storage for almost a century before its glorious workings were put on display once more.

This chimerical bridge/tunnel appears to dead end right into the sea.

Swedish skyscraper with a 90° twist.

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

Villas that once served as playgrounds for the rich now fall away in decay.

An abstract monument to a symphonic composer.

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

An alien church provides much needed silence in the midst of a Finland shopping center.

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

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

The Guardian of Tallinn.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

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

The silly symbol for an underground protest group is now scattered around the city.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

One of the largest Roman settlements in Portugal.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This legendary city has been a tourist attraction for centuries.

Monasteries on rock pillars, once accessible only by frayed ropes.

Largest necropolis in the Mediterranean.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Secret refuge and museum of the Duke of Florence.