Site near Zakynthos predates civilization by millions of years and bears striking resemblance to Hellenic structures but is result of process called concretion Columns strewn across the seafloor, detached from their familiar circular bases; tiles as from an ancient Greek courtyard above the water’s reach on an island nearby. A sunken city – or so the snorkelers thought. Related: Dagger in Tutankhamun's tomb was made with iron from a meteorite Continue reading...