The Chara Sands is an area of sand in Siberia near the Kodar and Udokan mountain ranges. It is a small desert 3 kilometers wide by 6 kilometers long, located in the Charsk basin amid the valleys of Chara, Middle Sakukan and Upper Sakukan rivers. The rapid change from the pine and larch forests and peat bogs to the sand has no transition zone—this is one of the peculiarities of this unusual area, besides the roaming sand dunes and the oases that emerge among them.