Ovoo in Mongolia
Ovoos are usually made from rocks with wood 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.