Planinca lies in a heavily wooded area on the northwest slope of Mount Krim . Lisec Hill () stands immediately south of the village, and Planinca Hill (, ) immediately to the north. There are several caves in the vicinity, including Kevdrc Cave (about long) southeast of the village and the Ledenica Shaft (about long) to the northeast. There is gravel road access to the village from Jezero to the north and from Tomišelj to the east.