One of the most photographed locations in the entire city.

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

Get hands on with the technological marvels of the Classical world.

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

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

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.

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

An abandoned Byzantine fortress and notorious prison.

These caves secretly held national treasures during World War II.

A little-known park with unusual, half-ruined structures and a mystical energy.

Where commuters walk through remnants of an ancient Greek necropolis.

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

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

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

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

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

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

The oldest railway bridge in Malaysia.

The world's seventh-largest coral reef contains an incredible amount of biodiversity.

This cruise ship-turned-warship sank during World War II, and is now a world-renowned dive site.

From atop a hill at the center of Cape Town, a cannon has been signalling the time since 1806.