Definition: Natural monument
Protected area managed mainly for conservation of specific natural features.
This category normally contains one or more natural features of outstanding national interest being protected because of their uniqueness or rarity. Size is not of great importance. The areas should be managed to remain relatively free of human disturbance, although they may have recreational and touristic value.
Food and Agriculture Organization of the United Nations (FAO), "The Forest Resources Assessment Programme (FRA 2000)", Terms and Definitions, United Nations, Rome, 1998