Two big reveals This is the most dramatic coastline nobody talks about, inches away from one of the best clifftop drives in Europe, equally unheard of. The Calanques of Cassis The Calanques are deep limestone fingers cut into the coast between Marseille and Cassis. The Mediterranean fjords. The geology here is dramatic: ancient tropical limestone pushed up from the ocean floor over millions of years, carved out by ice-age rivers, then drowned by the rising sea. Because the rock is nearly pure calcium carbonate, it acts like a giant mirror — and the water turns a color that needs a name. Neon-blue, as if light is iradiating from deep within. I…