Markovo Kale

About

Markovo Kale is a fortress located 3.5 kilometres (2.2 mi) northwest of Vranje, Serbia. It's situated on a steep rocky crest between the mountains Krstilovica and Pljačkavica. The fortification is surrounded by two rivers on the bottom, Devotinska and Mala Reka.

Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.