Geologist Iain Stewart travels the Mediterranean to trace how faults, volcanoes, and mineral deposits have shaped the history of the region. He starts with earthquakes, tracing the crack network running beneath Greece and Turkey, and visits Corinth, leveled by an 1858 earthquake that pushed builders toward quake-resistant construction. In Turkey he tours Sardis, once one of the ancient world's richest sources of gold, and connects the same geological processes to the landscape surrounding it. In Jordan he stands at the Dead Sea, reading its mineral deposits as both an ancient medicine chest and a byproduct of the rift valley that formed it. Stewart also traces how these same geological features shaped local religious belief and, later, regional cuisine. Across the series the argument stays consistent: Mediterranean civilizations built their cities, economies, and beliefs on top of a landscape defined by fault lines, and reading the rock explains as much about the region's history as any written record.