Detailed map of the southeastern area of northern East Prussia. Parts of the former districts of Insterburg (now Tschernjachowsk), Gumbinnen (now Gussew), Stallupönen/Ebenrode (now Nesterow), Darkehmen/Angerapp (now Osjorsk), and Goldap (now Goldap). Today, it predominantly covers Russia and a narrow strip of Poland. Inset map of the area of the main stud farm Trakehnen (now Jasnaja Poljana) at a scale of 1:50,000. Depiction of all towns and settlements that existed here before 1945, with their historical East Prussian names and the names that were in use from 1938 to 1945. Representation of all currently existing places with their current names in Cyrillic and Latin. A place name index with 1,430 names. Listing of the most important sights. Also includes depictions of decommissioned railway lines.