At the summit of the Gallitzinberg is an observation tower which in 1956 replaced an older steel construction that had been erected in 1899 in commemoration of the 50th anniversary of emperor Franz Joseph I's ascendancy to the Austrian throne. Therefore, the present tower is still colloquially known as the Jubiläumswarte (jubilee tower). Its topmost platform, 31 meters above ground, offers an impressive panorama of Vienna. On very clear days one can see for more than 60 kilometers, to the Slovak Little Carpathians beyond the city in the East, and to the Schneeberg, Lower Austria's highest mountain, in the South. Next to the tower it is a small facility dedicated to the education of Vienna's schoolchildren in the fundamentals of forest biology. Also in the immediate vicinity, but with few remains visible above ground, is the legacy of the Gaugefechtsstand Wien, a Wehrmacht command and control bunker which during the later years of World War II coordinated air alarms and aerial defense for Vienna and its surroundings.