Tourists walk on Pnyx hill

Tourists walk on Pnyx hill in front the ancient Acropolis hill, with the ruins of the fifth century BC Parthenon temple in Athens on Tuesday. Beginning as early as 507 BC, the Athenians gathered on the Pnyx to host their popular assemblies, thus making the hill one of the earliest and most important sites in the creation of democracy. [Petros Giannakouris/AP]