The tourists were accused of having violated the sacred ground by trampling and taking photos.

violated 是动词 violate 的过去分词形式，在句中表示被动完成时态。violate 的意思是"违反、亵渎"，来自拉丁词根 violare（侵犯），常用于表示违反规则或亵渎神圣的事物。