The Arabian Peninsula consists largely of an extensive highland. In the west, the plateau forms a steep break in the edge, which runs parallel to the coast of the Red Sea. In the northwest there is practically no coastal plain. The highest peaks are in the southwest in the Asir Mountains. The highest mountain is the Jabal Sauda with 3133 meters.
East of the rim break, the inhospitable highlands gradually slope down to the shallow waters of the Persian Gulf, whose coast is lined with marshes and salt flats. The highlands consist mainly of a vast sandy desert and stretches of bare volcanic rock. A broad band of desert, "the Empty Quarter" Rub al-Chali, stretches across the entire south of the country.
Country border
Saudi Arabia is bordered by Jordan (744 km common border), Iraq (814 km), Kuwait (222 km), Qatar (60 km), the United Arab Emirates (457 km), Oman (676 km) and Yemen (1458 km). Saudi Arabia and the island of Bahrain are connected by a highway, the 26 km King Fahd Causeway via bridges, causeways and an artificial island. On this island is the state border with Bahrain. What is striking about the course of the border is that it is very straight, especially in the north, without large bulges.
Saudi Arabia borders neighboring countries to the north, northeast, and south, and is bounded by the Red Sea and the Persian Gulf to the east and west. Saudi Arabia has a total of 4431 kilometers of land border, the longest section is the border with Yemen.
The border with Yemen was secured by barriers in 2003 and 2004, which led to diplomatic disagreements between the two states. Border disputes have also arisen with other neighboring states, such as the United Arab Emirates (1974) and Kuwait (1975). Between 1981 and 1983, the Neutral Zone was divided between Saudi Arabia and Iraq; in 1971, the second Neutral Zone north of al-Hasa had already been divided between Saudi Arabia and Kuwait.
EADS, now Airbus Group, is involved in the construction of the border facilities and border security. Police officers from Germany were sent to the country to train the personnel.
Climate and geology
Saudi Arabia has a predominantly hot and dry climate. The continental climate in the interior shows partly considerable temperature differences, especially between day and night. In summer, maximum temperatures of 50 °C are possible during the day, while in winter, temperatures can drop below freezing at night. The average annual temperature is 28 °C. Most of the sparse annual precipitation falls between December and February.
The supply of drinking water has always been ensured due to the country's wealth, although water scarcity is a growing problem because groundwater reserves are slowly depleting. Saudi Arabia has neither rivers nor lakes and is countering the water shortage by building deep wells and seawater desalination plants, which consume a significant amount of energy. The coasts of the Persian Gulf and the Red Sea are partially polluted with oil.
Geologically, Saudi Arabia lies on the Arabian Plate, which tilts to the east. In the west, it rises steeply from the Tihama Plain on the Red Sea with the exposed Precambrian rocks of the Arabian Shield, partly covered by younger volcanic rocks. While the northern landscapes, such as that of Hejaz, form more of a chain of mountains and hills along the coast, the more southerly Asir, similar to Yemen, is characterized by the rim escarpment, which is more than 1000 meters high over long stretches. From this coast-parallel edge, the land slopes gently eastward. From west to east, the monotonous landscape is initially formed by extensive scree deserts, covered in the west by many lava fields (harrat) or basalt boulders. Further east, younger strata have preserved, each beginning with a scarp to overlie the older strata. The largest of these escarpments, both in height and extent, is the escarpment of the Tuwaiq Escarpment, whose strata are of Jurassic age and are immediately preceded on the west side by a sand strip. In the central area these sand strips bear names such as (from north to south) Nafud as-Sirr, Nafud Qunaifidha and Nafud ad-Dahi. On the plain east of the Tuwaiq are the localities around the wells of Khardzh and the capital Riyadh, while further north are the localities of Qasim west of the northern Tuwaiq foothills, which eventually submerge beneath the sands of the Great Nafud. This plain, which forms a large part of the Najd landscape, is in turn accompanied for long stretches on the east by a precipice, the Buwaib, the strata of which belong to the Cretaceous period. On its plain runs the Dahna sand strip, which bounds the whole of the central landscape to the east. This is over 100 kilometres wide in places and feeds the Rub al-Chali in the south with sand from the Great Nafud Desert (an-Nafud al-Kabir) in the north. Further to the east follow more partly stepped plains, over which scree deserts extend on essentially limestone bedrock. Then to the east, dried-up former lake basins and salt flats increase until the coast is reached, which, measured in geological time, slowly rises from the Persian Gulf. Together with the gradual decline in precipitation since a brief wet phase a few thousand years ago - around the beginning of the Neolithic (Neolithic subpluvial) period - this conditions a gradual siltation and desiccation along the Arabian coast of the Persian Gulf. In the north and south of the country, the two great deserts of the Great Nafud and the Rub al-Chali dominate the landscape. Both reach the highlands of the Western Rim Mountains in the west. The central Tuwaiq Escarpment embraces the Arabian Shield like a vast arc open to the west, from which it is generally separated by the narrow sand fields.
flora and fauna
In most parts of the country, vegetation is limited to low grasses and small shrubs. Date palms grow in scattered oases. The Arabian oryx antelope was characteristic of the deserts of the Arabian Peninsula. However, the animals were wiped out by hunting in the recent past. Today, due to reintroduction programs, they live again in small numbers in their original habitats. One population lives in the western part of Saudi Arabia, in a huge fenced game reserve, the Mahazat-as-Sayd Sanctuary. Saudi Arabia's native fauna also includes various gazelles, Arabian wolves and Nubian ibex. Mantled baboons live in Asir National Park in the mountains in the southwest of the country. Some of Arabia's large animals, such as the cheetah and ostrich, are now extinct, while others, such as the leopard, have become very rare. Some bird species are also threatened with extinction.
Wild cats, desert-dwelling flying fowl, burrowing rodents and desert rats, as well as various reptiles and insects are widespread. The forest bustards, rediscovered in Syria a few years ago, also migrate to Saudi Arabia. The collared parakeet is found as a neozoon in many settlements. In the coastal waters of the Red Sea there are many marine animals, especially in the coral reefs.
Places of interest
Mada'in Salih, near the provincial town of al-Ula halfway between Medina and Ha'il in the north of the country, is by far the most famous ancient site in the country. It is a rock-cut burial site that is about 2000 years old. Remarkable about it are the rock inscriptions in Aramaic and Thamūdic, well preserved due to the dry weather. Very unusual in this area are the particularly numerous - due to weathering - rock formations, which appear to the viewer like images of animal and human figures. Other places of interest are the skyscrapers Kingdom Centre and Al Faisaliyah Center in Riyadh, the old city of Jeddah, the holy sites of Islam or the ruined quarter of Diriyya, which bears witness to the Ottoman-Saudi War. Jabal al-Qara is a sandstone formation in al-Hasa province. It is located west of the town of Hofuf and is a picturesque formation about two kilometers long and 1.2 kilometers wide.