Arthur, Merlin, and Guinevere are among the largest and oldest satellite dishes on the planet.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

400-year-old garden, restored to beauty.

The largest greenhouse in the world is home to over one million types of plants.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

An important example of architectural history slowly decays in the city center.

This abandoned shopping arcade has new life as an art installation.

The only ancient site that remains on the south bank of the sacred Ilissos river.

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

This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

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

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

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

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

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

These caves secretly held national treasures during World War II.

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

Scars of this building's past life as a violent prison still cover its walls.

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

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

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

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