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

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

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

An ancient octagonal weather station named for the eight Greek gods of wind.

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

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

Gladiators once walked this ancient, subterranean passage.

Underneath one of the region's most historic roads lies the home of Plato's successor.

A Byzantine-era church hidden in a wooded area below the Acropolis.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Where commuters walk through remnants of an ancient Greek necropolis.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

A man has revenged his true love's betrayal through tears and stone genitalia.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's deepest subway station is also a stunning ecological wonder.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This unique sculpture is often overlooked by pedestrians.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.