Here began Southern California's oil boom over 100 years ago

The Acropolis house that became Modern Greece’s first university.

This church was constructed on the site where St. Philip the Apostle preached to the ancient Athenians.

These ancient ruins hide in plain sight next to a dessert shop.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

An ancient Greek monument and a Byzantine church coexist inside this cave.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

One of the best-preserved medieval streets in Europe.

This striking sculpture of Icarus honors Greece's fallen flyers.

A stunning church overlooking the water that you will have all to yourself.

An abandoned Byzantine fortress and notorious prison.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

The ancient latrines of the Greeks, in all their public glory.

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.

A charming beach town in Turkey captures all the colors of the rainbow.

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.

This stone tower was built to protect Crete from incoming pirates.

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

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

Legend says this sacred tree was a gift from goddess Athena.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

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

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.