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

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

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

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

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

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

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

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

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

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

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.

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.

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

This ancient hydrological marvel is now the base of a modern outdoor cinema.

Large collection from the 3rd millennium BCE.

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

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.