Kranj is the third-largest city in Slovenia and the largest urban center of the traditional region of Upper Carniola and the Slovene Alps. It is locateā¦Kranj is the third-largest city in Slovenia and the largest urban center of the traditional region of Upper Carniola and the Slovene Alps. It is located approximately 20 kilometres northwest of the national capital Ljubljana, acting as the seat of the City Municipality of Kranj.