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

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

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

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

A former suicide bridge is now accumulating symbols of love instead of a body count.

"Only the dead get off at Kymlinge."

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

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Sweden's "good old days" painstakingly re-created in a model village.

The library's graceful rotunda is like a bibliophile's temple.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

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