In this book, we want to present to the reader a fascinating chain of our searches for the once forgotten field fortifications of the last quarter of the 18th century. in the Crimea. All of them were an important part of the defense system of the peninsula in the turning point for Russian history period 1774-1783. during the struggle for the annexation of Crimea to Russia. The unexpected discovery of one of these fortifications, which miraculously survived at the highest point of the Tarkhankut peninsula in northwestern Crimea, according to a sketch in the field diary of the famous archaeologist P.N. Schulz in 1933 and the latest space images, entailed a whole series of further discoveries... The book will be useful to historians, archaeologists, geophysicists, students, graduate students, administration representatives, and everyone who is interested in the past Crimea.