Definition
A Natural Monument or Feature is a protected area set aside to protect a specific natural monument, which may be a landform, sea mount, submarine cavern, geological feature such as a cave, or a living feature such as an ancient grove. The defining quality of the category is that protection is organized around the conservation of an identifiable natural feature and its immediate supporting environment. The site may be small or relatively modest in area compared with ecosystem-scale categories, but it must have a clearly recognized natural focus whose conservation is the primary reason for designation.
