A range of mountains extends along the northwest border and into Togo; these are the Atacora. The highest point, Mont Sokbaro, is at . Benin has fallow fields, mangroves, and remnants of large sacred forests. In the rest of the country, the savanna is covered with thorny scrub and dotted with huge baobab trees. Some forests line the banks of rivers. In the north and the northwest of Benin, the Reserve du W du Niger and Pendjari National Park attract tourists eager to see elephants, lions, antelopes, hippos, and monkeys. Pendjari National Park together with the bordering Parks Arli and W in Burkina Faso and Niger are among the most important strongholds for the endangered West African lion. With an estimated 356 (range: 246–466) lions, W-Arli-Pendjari harbors the largest remaining population of lions in West Africa. Historically Benin has served as habitat for the endangered painted hunting dog, ''Lycaon pictus''; however, this canid is thought to have been locally extirpated.