These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

Art historians have debated the identity of this medieval stone rider since the 19th century.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

An exquisite panometer representing Dresden as it was from 1695 to 1760.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

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

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

The "Prussian Versailles" that is as glorious today as when it was built.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A fascinating insight into daily life in the Eastern Bloc.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

This statue is the only female representation of Rome's "talking statues."

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.