This declassified Cold War bunker hosts a large collection of Swedish aircraft.

The charming storybook building now houses a small police museum.

Once the center of power for the region's various factories.

The world's biggest floating museum in Gothenburg, Sweden.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

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

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

Iron Age grave stones and Viking burials, a short drive from Gothenburg.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

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

According to legend, this boat-shaped henge is built over the grave of a mythic king.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

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

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

It houses the remains of a 17th-century version of the Titanic.

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

Wander among the abandoned ruins of this once-powerful medieval town.

This tower in a small Polish village uses the power of a sacred bell to ward off mischievous weather spirits.

An enigmatic mural hiding in plain sight in one of São Paulo's busiest metro stations.