The Musala Peak at 2'925 metres is the highest mountain of the Rila Mountains and also the highest summit on the Balkan Peninsula. The second and third highest summits on the Balkan Peninsula are the Mt. Olympus (2'917 m) in Greece and the Vihren Peak (2'914 m) in the Pirin Mountains.
Bulgaria 1936, Musala Peak.
There are several buildings on the top of Musala Peak, including a weather station.
Bulgaria 1967, Musala Peak.
The stamp was issued in the series "Mountains of Bulgaria".