The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

Public water fountains built during the Ottoman Era still stand throughout this seaside town.

This 18th-century former mosque held the first Hellenic Parliament.

This legendary city has been a tourist attraction for centuries.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

This influential Renaissance-era library was once the haunt of kings and monks.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Dozens of elegant ceramic tiles decorate these ancient walls, each displaying the Lord's Prayer in a different language.

The ruins of a fairytale castle with a tumultuous history stand high atop the mountains.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

This poignant art installation raises awareness of violence against women.

The tomb of the mythological founder of Padua is not hidden in some obscure crypt, but stands right in the middle of the city square.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."

A small Byzantine church lost in the middle of the mountains of southern Italy.

In medieval times this small stone seat was used as a bizarre way to punish insolvent debtors.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.