Partially wooden and stone Ovoo
"An ovoo (Mongolian: овоо, heap) is a type of shamanistic cairn found in Mongolia, usually made from rocks or from wood. Ovoos are often found at the top of mountains and in high places, like mountain passes... When travelling, it is custom to stop and circle an ovoo three times in clockwise direction, in order to have a safer journey. Usually, rocks are picked up from the ground and added to the pile. Also, one may leave offerings in the
form of sweets, money, milk, or vodka. If one is in a hurry while travelling and does not have time to stop at an ovoo, honking of the horn while passing by the ovoo will suffice..."