In 1999 the Kingdom of Saudi Arabia celebrated the centenary of its founding by King Abdulaziz bin Abdulrahman Al Saud. The opening of a national monument, the King Abdulaziz Historical Center was one of the highlights of the celebrations, inaugurated by the Custodian of the Two Holy Mosques, King Fahd bin Abdulaziz Al Saud. Parks and green areas mark the main features of the Center with its numerous social and cultural structures, adding a natural environmental image and availing a green area in the center of the City. There are five main fenced parks, a sixth open park, a vast main Maidan, an oasis of Palm Trees and a water stream flowing from an old water well. The Maidan, a vast square of 20,000 sq. m., is situated in the middle of King Abdulaziz Historical Center. It is intended to be used for social and cultural celebrations on exceptional occasions and Eids. The Parks occupy an area of 20-30 thousand m² each. Forming the major part of the Center's area. The other facilities of the Center seem as islands surrounded by green areas. A palm oasis of 100 palm trees, indicating the elapse of 100 years, overlooks the Maidan from a higher ground. In the northern part of the Maidan, an old water well was reconstructed. Water is pumped from the old well in a water stream running across the central park and terminating in an artificial lake with a large children’s playground.