A giant Troll lurks under one of Seattle's oldest bridges.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

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.

Preserved portions of Athens's ancient defenses are on display in a subterranean parking garage.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

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

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

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

The ruined doorway is a portal to the building's turbulent and torturous past.

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

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

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

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

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

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A sculpture serving as an homage to Pope John Paul II.

This ancient market is often referred to as the oldest shopping mall in the world.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.