monument to the unknown hero of avala, called spomenik neznanog junaka. built in 1934 - 1938, it's a major wwi memorial

avala monument spomenik unknown hero neznanom junaku architecture hill mountain balkan balkans belgrade beograd world war historical building history landmark memorial neznani junak serbia soldier srbija statue tourism travel wwi yugoslavia neznanog junaka tribute commemoration sculpture heritage serbian visit military remembrance mausoleum historic