One of downtown Berlin's last reminders of its Communist past.

A fascinating insight into daily life in the Eastern Bloc.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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

An existential riddle in the world's largest ancient castle.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

The ancient latrines of the Greeks, in all their public glory.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

A charming beach town in Turkey captures all the colors of the rainbow.

Giant marble phalluses on the sacred island of antiquity.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.