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

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

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

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

Apartment complexes built into huge repurposed natural gas tanks.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

A diminutive statue that was inspired by the sculptor's own daughter.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Tucked away in a downtown Stockholm park are the remains of a World War II defense position.

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

Stockholm's deepest subway station is also a stunning ecological wonder.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Stockholm's narrowest alley is barely over two feet wide.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

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

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's tiniest statue is of a small boy looking at the Moon.

A heated statue pays tribute to one of Sweden's great actresses.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.