 It covers nearly 5019 square kilometers and is located in four counties, Ningqiang County, Nanzheng County, Xixiang County, and Zhenba County, with the largest sinkhole (520 meters in diameter and 320 meters deep), near Sanyuanzhen () in Zhenba County.The natural landscape of the region, the Daba Mountains evergreen forests, is listed by the World Wildlife Fund (WWF) as one of the world's 200 ecoregions that should be a priority for conservation.Dabashan National Nature Reserve is located in the Chongqing part of the Daba Mountains (Chengkou County); Shennongjia Mountain Nature Reserve (), in Hubei (Shennongjia Forestry District).