Ovoo or obo (Mongolian: овоо, Traditional Mongol: ᠥᠪᠥᠭᠭᠠ, "heap"; Chinese: 敖包 áobāo, lit. "magnificent bundle [i.e. shrine]") are sacred stone heaps used as altars or shrines in Mongolian folk religious practice and in the religion of other Mongolic peoples. They are usually made from rocks with wood. They serve mainly as sites for the worship of Heaven and lesser gods led by shamans and kins' elders, but also for Buddhist ceremonies.