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

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

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

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

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

An ancient Greek monument and a Byzantine church coexist inside this cave.

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

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

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

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

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

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This stunning concert hall has become a symbol of Iceland's national recovery.

An encyclopedic collection of mammal penises.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.

Haunting and beautiful trees, doomed to die.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

A stack of stones steeped in Irish folklore, much like the hero they're connected to, hide in plain sight.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.