main entrance door of baruun zuu temple in erdene zuu khiid monastery, orkhon valley world heritage site kharkhorin mongolia

abtai ancient architecture asia asian baruun buddha buddhism buddhist central construction cultural culture door emtrance entrance erdene famous gate gelug genghis heritage historic journey karakorum khan kharkhorin khiid landmark landscape main monastery mongolia mongolian monument nobody orkhon ovorkhangai part people province red religion sacred sain shrine site spirituality temple tibetan tourism tradition traditional travel unesco valley world zuu