 The main portion of the city is separated from several landmarks—the monastery, the fort and the port, as well as its suburbs—by another tributary, the Ida (or Ushakovka) River.The two main parts of Irkutsk are customarily referred to as the "left bank" and the "right bank", with respect to the flow of the Angara River.Irkutsk is situated in a landscape of rolling hills within the thick taiga that is typical in Eastern Siberia.