Najd or the Najd Highlands is the region located in the middle of the Kingdom of Saudi Arabia and where the capital Riyadh is located. Its borders extend from the mountains of Hayel to the north to the Empty Quarter to the south, and from the desert of Nafud to the east to the Hijaz Mountains to the west. It has been a fertile land rich with pastures, wild birds and animals such as ostriches, deer and rabbits, and with many oasis and palm farms. It was also home to a number of Arab tribes and many of the old poets wrote poetry about Najd and mentioned by many orientalists.