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

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

A black cat protests the City Guild in Riga's Old Town.

3,000 market stands in five former Zeppelin hangars.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

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

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

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

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

"There's nothing there," and other lies the KGB told us.

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

The enormous isokinetic structure hangs within a science center in Estonia.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

This enormous censer uses a pulley system installed over 400 years ago.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

A fortress off the West coast of Portugal that dates back to 1502.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

A whimsical bridge adorned with decorative dragons.

Bridge that died in war and was resurected.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.