Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

This legendary city has been a tourist attraction for centuries.

This church is dedicated to the patron saint of seafarers.

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

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

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

The Greek War of Independence was declared at this medieval Byzantine sanctuary.

This sixth-century church housed an icon with eyes so beautiful legend has it they inspired the name of a Greek city.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

Rome’s legendary peephole vista is also a former Crusader stronghold.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A small cell adjacent to this church was once the bedroom for a renowned saint.

The charred, dead skeleton of an oak tree is said to have consoled a dying 16th-century Italian poet.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Gods clash with machines in a power plant regenerated as a museum.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

A huge enchanting public park just outside the ancient walls of Rome.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

A literary park dedicated to the memory of a filmmaker, writer, and intellectual who was killed in 1975.

Paris' fabled purveyor of exotic taxidermy and natural history curios.