Mt. Mučanj (Mu-tshany)is one of the mountains that surround Ivanjica. Its summit (1530m) is called 'Jerinin Grad' ('Jerina's Town'). The name is given according to popular belief which says that the summit was once a town built by Irinni ('Jerina'), the wife of Djuradj Brankovic, the ruler of medieval Serbia.