Open land is a term used to describe land that is not developed or cultivated. It can include heaths, moors, tracts, fields, and plains. A HEATH is an area of open uncultivated land with low-growing vegetation, such as shrubs and grasses. A MOOR is an area of open land, typically highland, covered with heather, grass, and bracken. A TRACT is a large area of land, especially one that is rural or uninhabited. A FIELD is an area of land, enclosed or unenclosed, used for agricultural purposes. Finally, a PLAIN is an extensive area of flat or gently rolling land, especially in a warm region.