The basin consists of four geographic units: the Lower Valley (), Upper Valley (), Ukanc Basin or Lake Basin (; Jezerska kotlina), and Nomenj Basin (). It is bounded by the Komarča head wall on one end and Soteska Canyon at the other. The Lower Bohinj Mountain Range represents its southern border. The Sava River has carved a canyon between the Jelovica and Pokljuka plateaus in the east. To the north, Mount Triglav, Slovenia's highest mountain, is also a part of the municipality.