The Arkansas Timberlands (sometimes also called Southern Arkansas or Southwest Arkansas) is a region of the U.S. state of Arkansas generally encompassing the area south of the Ouachita Mountains, south of Central Arkansas and west of the Arkansas Delta. With several different definitions in use by various state agencies, the Arkansas Timberlands is essentially a region known for dense pine and cypress forests covering hilly terrain and lining numerous rivers. Modern settlement created a significant logging industry and subsequent clearance agriculture which provided the basis of the local economy until the discovery of petroleum. Local tourism is largely based on the popularity of deer hunting and bass fishing. Attractions there include Marks' Mills Battleground Historical Monument, Jenkins' Ferry Battleground Historical Monument, Overflow National Wildlife Refuge, Felsenthal National Wildlife Refuge, South Arkansas Arboretum, Arkansas Museum of Natural Resources, White Oak Lake State Park, Poison Springs Battleground State Park, Millwood State Park, and Pond Creek National Wildlife Refuge. The Arkansas Timberlands is the birthplace of former President of the United States Bill Clinton.