The book is devoted to interesting and mysterious questions of the ancient geography of the Black Sea (Pont Euxinsky). The reader will get acquainted with the geological history of the Black Sea, with important geographical changes that have occurred over the past 2.5 thousand years, and learn how the sea intensively comes to land and changes the contours of the coast. These changes have given rise to many geographical mysteries that scientists are trying to solve based on the results of complex paleogeographic and historical-archaeological studies.