"Diary of military scouts and fortresses" is the work of the outstanding Spanish scientist Felix de Azara, incorporating memories, observations and analyzes made by him during his service in South America at the end of the 18th century. The author, being a naturalist and geographer, describes in detail nature, local residents, as well as military facilities created to protect the territory. The book offers the reader a unique opportunity to step under the feet of the author through the picturesque landscapes of Latin America and to be transported into the reality of military shots and battles of that time. This is a valuable document both for historians and for lovers of adventure literature who want to feel the spirit of expeditions and discoveries of past ages.