The way through the southern Baltic is the only one of the three routes that only lead over land. It passes through larger cities such as Berlin, Warsaw, Vilnius and Riga and was attractive to diplomatic travelers and scholars because of the cultural sights and collections they could visit along the way. It is the only route that passes through many parts of the territory of modern Estonia.
The maps chosen for this route begin with a larger view of Europe as a whole and then successively zoom in to individual points along the way. The selection of historicized maps and the occasional unique or hand drawn specimen allow glimpses of the historical and spatial situation on the route. Having reached the cultural region of Wolfenbüttel, a number of special highlights are presented, among them Goslar as a UNESCO World Heritage Site and the Herzog August Bibliothek, which was praised as the eighth wonder of the world in the 17th century.