The Turpan Depression or Turfan Depression, is a fault-bounded trough located around and south of the city-oasis of Turpan, in the Xinjiang Autonomous Region in far Western China, about 150 kilometres (93 mi) southeast of the regional capital Ürümqi. It includes Lake Ayding, −154 metres (−505 ft), the second or third lowest depression on Earth. By some measures, it is also the hottest and driest area in China during the summer.