Dunes and erratic boulders - interesting geological formations occurring in the Łuków commune are dunes. Between Gręzówka and Klimki there is Łysa Góra - a typical inland parabolic dune, exploited by the local population (you must not get too close to the walls of the exposure - dangerous due to landslides). In the forest complex behind the cemetery there is one of the longest dune sequences in Podlasie - the dunes there are covered with coniferous forest. There are also numerous erratic boulders and mineral river valleys in the commune, providing great potential for the development of geotourism.