Arkansas can generally be split into two halves, the highlands in the northwest half and the lowlands of the southeastern half.
This dual split can yield to general regions named northwest, southwest, northeast, southeast, or central Arkansas.
Crater of Diamonds State Park near Murfreesboro is the world's only diamond-bearing site accessible to the public for digging.
The Kansa tribe of Native Americans are closely associated with the Sioux tribes of the Great Plains.
The word "Arkansas" itself is a French pronunciation ("Arcansas") of a Quapaw (a related "Kaw" tribe) word, akakaze, meaning "land of downriver people" or the Sioux word akakaze meaning "people of the south wind".
Arkansas is divided into three broad ecoregions, the Ozark, Ouachita-Appalachian Forests, Mississippi Alluvial and Southeast USA Coastal Plains, and the Southeastern USA Plainsand two biomes, the subtropical coniferous forest and the temperate deciduous forest.
The state is further divided into seven subregions: the Arkansas Valley, Boston Mountains, Mississippi Alluvial Plain, Mississippi Valley Loess Plain, Ozark Highlands, Ouachita Mountains, and the South Central Plains.