Dedicated to this region's early settlements and rich history of salt mining.

The world's oldest known salt mine.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Cages that once displayed the bodies of executed leaders hang from a German church tower.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

An awesome blend of traditional architecture and street art.

This jar honors the role that pottery has played in this Tunisian village over the past millennia.

At this concrete bunker on the Trondheim fjord, secrets lie above and below the water's surface.

The world's first and only escalator for lazy bicycles and their daunted riders.

St George's Leprosy Museum depicts the gruesome afflictions of those suffering from the disease.

The former home of Norway's greatest romantic composer.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

This church conducts its services entirely in Norwegian sign language.

This one-of-its-kind shipyard brings the 12th-century Viking Age back to life.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

The Brutalist building harbors an unusual inverted dome that swoops down over its central sacred room.

This record shop and unofficial black metal museum is an ode to Oslo's heaviest musical export.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

This handsomely carved wooden church is more than 800 years old.

Home to three historic ships from the age of Vikings.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

The rock carving that became an internet meme.

Sweden's largest remaining gantry crane is a relic of Gothenburg's industrial past.

Old Danish castle immortalized in Shakespeare's Hamlet.