Eduard Suess was a well-known Austrian geologist, who shaped generations of geologists with his concepts, such as the supercontinent Gondwana and the Tethys Ocean. His correspondence with numerous scientists of his time and the establishment of "The Face of the Earth" made a foundation for modern geology. One of the scientists with whom E. Suess exchanged letters was Vladimir A. Obruchev, a Russian geologist and "the father of Siberian Geology", who studied areas around Lake Baikal, Altai Mountains, and Central Asia. In this study the authors analysed the correspondence between V. A. Obruchev and E. Suess, which give insights not only in their scientific exchange but also in development of their personal friendship. Furthermore, their exchange of scientific data, ideas and knowledge influenced the work of "The Face of the Earth", in particular chapters dealing with Lake Baikal, Altai Mountains and Central Asia. The main aim of this study was to analyse historical documents in form of letters, sketches, and maps from V. A. Obruchev from the Geological Archive in Vienna.