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 narrowest alley is barely over two feet wide.

A man has revenged his true love's betrayal through tears and stone genitalia.

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

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

The world's largest model of our planetary system.

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

The official meeting point for the oddly named governing assembly of ancient Sweden.

Legend says this fabled well held part of a mythical Norse tree.

A large collection of ancient runestones decorates this university courtyard.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

Uppsala's adorable feline sign celebrates a popular children's book set in the Swedish city.

Ancient burial grounds of the wealthy.

This misspelled graffiti reappears every time it is removed.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The former home of Norway's greatest romantic composer.

The grandest stage for the world's foremost masters of invisible instruments.

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