Crete is famous not only for its antiquities, the civilizations and the biodiversity, but also for its fascinating geology. This field guide was prepared as a general textbook for the geology of Crete, suitable for geological excursions and visits to the island. The most recent aspects on the geological and tectonic evolution of Crete were considered, as well as the knowledge of the petrology, stratigraphy and palaeontology established by many geologists since the beginning of the century.