Rila 's a mountain range in southwestern Bulgaria and the highest mountain range of Bulgaria and the Balkans, with its highest peak being Musala at 2,925 m. The massif's also the sixth highest mountain in Europe (when each mountain's represented by its highest peak only), coming after the Caucasus, the Alps, Sierra Nevada, the Pyrenees and Mount Etna, and the highest between the Alps and the Caucasus. The larger part of the mountain's occupied by the Rila National Park. The name Rila's allegedl… (More on Rila)