Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

After local authorities changed the design, the building's architect, Le Corbusier, wanted nothing to do with it.

Metro station with a claim to rock n' roll fame.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

A fascinating insight into daily life in the Eastern Bloc.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

The Guardian of Tallinn.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

Finland's oldest astronomical observatory once played a crucial role in seafaring and timekeeping.

A stunning architectural yet functional feat, towering over Oslo.

Controversy surrounded the creation of this anti-fascist statue.

The cheese slicer may be a Norwegian invention, but the biggest ones in the world are found in Sweden.

Contrasting the old concrete courthouse beneath, a modern and colorful residential marvel has emerged, stirring both acclaim and controversy.

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

A 200-year-old collection of medical paraphernalia in a historic house.

Explore the frozen river and take a walk to a nearby island on some of the longest ice roads in Sweden.

The world's first purpose-built indoor shopping mall opened in Sweden in 1955.

A sharp sculpture made of thousands of pieces of jagged glass.

The only Roman honorific column in Istanbul.

An ancient necropolis of magnificent tombs.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Monasteries on rock pillars, once accessible only by frayed ropes.