Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A Serbian church lit by chandeliers made of weapons.

A small museum built by a family that survived the Siege of Sarajevo.

A Turkish ghost town abandoned in a population exchange with Greece.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

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

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

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

Ancient serpentine sacrifice holder that has stood the test of time.

Roman ruins, natural methane fires and a lovely beach.

Flames have been burning within this mountain for more than 2,500 years.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

This famous archeological mystery may be an ancient example of movable type.

Hideout of thieves, monks, and goat-footed gods.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

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

The hallucinogenic center of the ancient world.

This historic black and white monastery is one of Bulgaria's architectural jewels.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

A museum dedicated to secret surveillance.