This 11th-century castle sits so low you can't see it behind the surrounding buildings.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

Mosaics, storks, and brothels—this ancient city has it all.

The other side is actually green.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

Crumbling necropolis set high above Fez.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

An ancient necropolis of magnificent tombs.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

Down this Cracovian street resides a plaque with a stark message about the city's air pollution.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

Real bones which are said to have belonged to a Polish dragon.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.