This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

She asked for a potato cellar and over the next 23 years he gave her a network of holy caves.

Despite producing just a handful of movies, a brave and lyrical filmmaker has an entire museum dedicated to him.

Go inside to really appreciate this 500-year-old technological masterpiece.

Da Vinci's equestrian statue, 500 years in the making.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Where commuters walk through remnants of an ancient Greek necropolis.

The hallucinogenic center of the ancient world.

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