A computer graphic shows the concentric rings that may have existed during Atlantis' ancient heyday. Scientists have seen evidence of submerged structures beneath the vast marshlands of southern Spain's Dona Ana Park.
ARCHITECTURE: Aerial view of the ruins at Persepolis. Persepolis was the ceremonial capital of the Achaemenid Empire (ca. Persepolis is situated 70 km northeast of the modern city of Shiraz in the Fars Province of modern Iran.
The Cloud People, Los Pinchudos, Perú - the figures' gazes are fixed where the first rays of the rising sun will appear over the vast Utcubamba Valley. Known as the Warriors of the Clouds, the Chachapoyas (a name given to them by the Inca who conquered th