How does an outcrop of rocks help trace the history of the Earth? Where can one observe oceanic depths at the top of a mountain? What is the common point between the Himalayas and the Brittany coast? Why do the sculptures of a Roman cloister evoke a beach? Who were the French scientist-adventurers in geology since the 17th century? More than just a guide, this extensively illustrated book answers all these questions and many more. Natural sites, museums, themed trails, geological reserves... Some 2000 places to discover are presented. The stones of buildings offer another approach to regional geology. With the Guide to Geology in France, the reader-walker discovers a vivid image of geology and gains a new perspective on the surrounding landscapes.