The atmospheric road was never meant to be so creepy.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

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

Once the home of a hermetic monk, this cave now houses a small church.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

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.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

Step inside an ancient beehive tomb built for a mysterious cult hero.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

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

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

This ancient hydrological marvel is now the base of a modern outdoor cinema.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

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

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

A sprawling collection of books and manuscripts about ancient Greece that would have put their famed libraries to shame.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

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

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

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

An ancient octagonal weather station named for the eight Greek gods of wind.