An Nafud

The Nafud desert, or simply the Nafud (Arabic: صحراء النفود, romanized: ṣaḥrā' an-nafūd), is a desert in the northern part of the Arabian Peninsula at 28°18′N 41°00′E / 28.30°N 41.00°E / 28.30; 41.00, occupying a great oval depression. It is 290 kilometres (180 mi) long and 225 kilometres (140 mi) wide, with an area of 65,000 square kilometres (25,000 sq mi).

The Nafud is an erg, a desert region located in north-central Saudi Arabia. It is noted for its sudden violent winds, which account for the large crescent-shaped dunes. The sand in the Nafud is a brick-reddish color. Rain comes once or twice per year. In some lowland areas, namely those near the Hejaz Mountains, there are oases where dates, vegetables, barley, and fruits are grown. The Nafud is connected to the Rub' al Khali by the Dahna, a corridor of gravel plains and sand dunes, 800 mi (1,287 km) long and 15 to 50 miles (24.1 to 80.5 km) wide.