Jordan is a small, mostly arid kingdom in West Asia, covering 89,342 km² between Syria, Iraq, Saudi Arabia, Israel and the West Bank, with just 26 km of coastline on the Gulf of Aqaba. Its land falls into three strips running north to south: the Jordan Rift Valley in the west, which holds the Jordan River, the Dead Sea and Wadi Araba; a band of limestone highlands and plateau mostly 700 to 1,200 m high; and the eastern desert, part of the Syrian and northern Arabian deserts, which covers by far the greatest share of the country. The highest point is Jabal Umm ad Dami at 1,854 m near the Saudi border, the lowest is the Dead Sea shore at roughly 440 m below sea level, and the main river is the 251 km Jordan, fed by the Yarmouk and the Zarqa. Six named features explain how that land works.
Jabal Umm ad Dami and the Sandstone Towers of Wadi Rum
Jordan's roof is not in the green north but in the far south, in the desert of Aqaba Governorate. Jabal Umm ad Dami rises to 1,854 m, a figure consistent with satellite (SRTM) elevation data, about 30 km south of Wadi Rum village and close to the Saudi Arabian border. Jordan's second-highest peak, Jabal Ram at 1,734 m, stands directly above the Rum valley, facing Jebel Umm Ishrin across the sand, which may be only a metre lower.
Wadi Rum itself is the largest wadi in Jordan, covering 720 km² about 60 km east of Aqaba, and has been a UNESCO World Heritage Site since 2011. Its scenery comes from rock layering. Near-vertical mountains of iron-rich, erosion-resistant Umm Ishrin Sandstone, the thickest unit of the Nubian Sandstone sequence, stand on older arkosic beds that in turn rest on eroded granite of the Aqaba Complex. An aquifer forms along that rock contact, and its water emerges as springs on the eastern mountain slopes. Between the towers lie flat valley floors of alluvium, salt pans and wind-blown sand, including climbing dunes that ramp up the cliff faces. People have lived here since prehistory: the Khaz'ali Canyon carries petroglyphs of humans and antelopes from the Thamudic period, and Nabataean inscriptions are scattered through the valleys.
North of Wadi Rum the highlands continue as a steppe of deeply cut limestone plateaus averaging about 900 m, with summits around 1,200 m in the north and above 1,700 m in the south. These uplands catch the winter rain and hold Jordan's long-settled villages and most of its cities, including Amman, whose population reached 4,007,526 in 2015.
The Dead Sea, Earth's Lowest Shore
West of the plateau the land plunges in a steep escarpment into the Jordan Rift Valley, a segment of the north-south rift system whose successive basins are the Sea of Galilee, the Jordan Valley, the Dead Sea, Wadi Araba and the Gulf of Aqaba. Jordan's western border follows the floor of that rift. Its deepest basin is the Dead Sea, a landlocked salt lake shared with the West Bank and Israel, whose surface stood about 439.8 m below sea level in 2025, making its shores the lowest land-based elevation on Earth.
The lake has no outlet, so water leaves only by evaporation, which is intense under year-round heat. The result is a salinity of 34.2 percent (measured in 2011), about 9.6 times saltier than the ocean, and a density of 1.24 kg per litre that makes swimmers float. At 304 m deep it is the deepest hypersaline lake in the world. The main northern basin is about 50 km long and 15 km wide; the southern basin has been cut off as the falling water turned the old Lisan Peninsula into a land bridge.
That fall is the defining fact of the modern Dead Sea. Its surface area has shrunk from about 1,050 km² in 1930 to roughly 605 km² today, largely because its feeders have been tapped upstream: the Jordan River has been substantially diverted and now supplies only about one-sixth of the inflow, less than direct rainfall, and the water of Jordan's Wadi Hassa is entirely consumed before it arrives. Mineral works on both shores also evaporate brine to extract potash. Several canal and pipeline schemes have been proposed to top the lake up from the Red Sea, but the best known, the Red Sea–Dead Sea Water Conveyance, was scrapped. Our Dead Sea geography guide follows the lake's decline in more detail.
Wadi Mujib, the Gorge That Broke Through
Halfway down the Dead Sea's eastern shore, about 90 km south of Amman, a slot of sandstone opens to the lake. This is the outlet of Wadi Mujib, the ancient Arnon, which in antiquity marked the northern boundary of the kingdom of Moab. Seven tributaries feed it, draining a basin of 6,571 km², and the river reaches the Dead Sea around 420 m below sea level.
The gorge has an unusual origin. During the last ice age the Dead Sea's ancestor stood at about 180 m below sea level, some 240 m higher than today, and flooded the lower ends of the canyons along its banks, filling them with lake sediment. When the water dropped, about 20,000 years ago, most canyons cut back through their plugged mouths. Wadi Mujib instead abandoned its old outlet and broke through a crack in the sandstone, and the full discharge of that huge catchment has been scouring the crack deeper ever since.
Because the river flows year-round, the gorge is a corridor of life through dry country. The Royal Society for the Conservation of Nature created the 212 km² Mujib Reserve in 1987, and UNESCO named it a biosphere reserve in 2011. The reserve climbs from the Dead Sea shore to about 1,277 m in the Karak and Madaba mountains, a vertical range of roughly 1,700 m, and more than 300 plant species and 10 carnivore species have been recorded there. Upstream, the Mujib Dam, completed in 2004 where the modern road crosses the valley, now holds a reservoir.
The Jordan River, the Yarmouk and the King Abdullah Canal
The river that named the country is short. The Jordan runs 251 km from the meeting of the Dan and Hasbani, streams fed from the foot of Mount Hermon, through the Sea of Galilee, to the Dead Sea, and forms Jordan's border with Israel and the West Bank for much of the way. The valley it occupies, known locally as Al Ghawr or the Ghor, is the northern part of a 380 km rift that runs from the Yarmouk all the way to Aqaba; it reaches 22 km wide at most, walled by escarpments on both sides. South of the Dead Sea the same trough continues as Wadi Araba, 180 km of dry valley floor to the Red Sea.
The Jordan's largest tributary is the Yarmouk, which drains much of the Hauran plateau. Upstream it forms part of the Jordan–Syria border, a line inherited from the 1923 Franco-British boundary agreement, and lower down part of the border with Israel. Shared Yarmouk water is governed by agreements between Jordan and Syria (1953 and 1987) and between Jordan and Israel (the 1994 peace treaty), and the Al-Wehda Dam was built on the Jordan–Syria border in the 2000s. The second tributary, the Zarqa, rises and ends entirely within Jordan, and is dammed at King Talal Dam.
Jordan's response to a thin river was engineering. The King Abdullah Canal, begun in 1959 and first known as the East Ghor Main Canal, takes Yarmouk water and runs 110 km south by gravity along the east bank of the Jordan, descending from about 230 m to almost 400 m below sea level. It irrigates the valley's farms and, through the Deir Alla–Amman carrier, supplies about 90 million cubic metres of drinking water a year to Greater Amman. The Jordan River guide traces the whole course from source to sea.
Azraq, an Oasis Pumped Dry
East of the highlands the plateau descends gradually into desert, where drainage often has no outlet to the sea and sediment settles in closed basins that dry into salt flats. In the middle of this country, 100 km east of Amman, lies Azraq, Arabic for "blue". Its spring-fed oasis was the only permanent source of fresh water in roughly 12,000 km² of desert, and it drew people for an extraordinarily long time: Lower Palaeolithic tools here date to around 500,000 to 300,000 years ago. The Romans built Qasr Azraq in the 3rd century AD, the Mamluks rebuilt it, and T. E. Lawrence used it as a headquarters during the Arab Revolt.
The oasis also sat on the flyway between Africa and Eurasia. The Royal Society for the Conservation of Nature declared a 12 km² wetland reserve in 1978, but from the 1960s the aquifers beneath Azraq had been pumped to supply fast-growing Amman, and by 1992 the natural springs had stopped. Migrating birds counted at Azraq fell from 347,000 in February 1967 to 1,200 in February 2000, and about 25 km² of former wetland dried out. Today the Ministry of Water releases some 10 million cubic metres a year to keep about a tenth of the original marsh alive, while Azraq still supplies roughly a quarter of Amman's drinking water.
Aqaba's 26 Kilometres of Red Sea Coast
At its southern tip Jordan touches the sea, and only just. Its shoreline on the Gulf of Aqaba is about 26 km long, the only stretch of border that stops the country from being landlocked. Even that is partly the product of diplomacy: under a 1965 agreement with Saudi Arabia, Jordan gained 19 km of gulf coast and 6,000 km² of interior territory in exchange for ceding 7,000 km² of landlocked land, giving room to expand the port.
The gulf itself is a continuation of the rift. It forms the southern end of the Dead Sea Transform, the left-lateral fault system along the boundary between the African and Arabian plates, and its floor holds three small pull-apart basins; movement on one of those faults caused the 1995 Gulf of Aqaba earthquake. The gulf is about 160 km long from the Straits of Tiran, only 24 km wide at most, and up to 1,850 m deep, a narrow trench between the Sinai and Arabian peninsulas. At its head sit three towns in three countries, Taba in Egypt, Eilat in Israel and Aqaba, which had 148,398 people in 2015 and is Jordan's only seaport. Its coral reefs and wrecks make it a premier diving area.
From Aqaba, the road north climbs out of the rift past Wadi Rum and back onto the plateau, crossing in a few hours most of the landscapes described here; our Wadi Rum desert guide is the place to start for the sandstone country on that route.