Jordan is an Arab kingdom in the Middle East, on the East Bank of the River Jordan, and extending into the historic region of Palestine. Jordan borders Saudi Arabia to the south and east, Iraq to the north-east, Syria to the north and Israel to the west, sharing control of the Dead Sea with the latter. It consists of an arid plateau in the east, irrigated by oasis and seasonal water streams, with highland area in the west of arable land and Mediterranean evergreen forestry. The Jordan Rift Valley of the Jordan River separates Jordan from Palestine and Israel. The highest point in the country is Jabal Umm al Dami, at 1,854 m (6,083 ft) above sea level, its top is also covered with snow, while the lowest is the Dead Sea −420 m (−1,378 ft). The most common tourist site is Petra capital of the Nabateans, a rose-stone city carved out of the cliffs and hidden among a complex of arid narrow gorges. Another historical site is Jerash, an ancient Roman city famous for its well-preserved street grid, hippodrome, and fine colonnades. Several other towns like Al Karak and Ajloun are home to large-scale well-preserved Crusader citadels. Jordan has significant religious sites as well like the Jordan River, which is the river where Jesus was baptised by John the Baptist, Madaba, a highly religious site renowned for its mosaics, and Mount Nebo, where Moses was said to have gone to get a view of the Promised Land before he died. Aqaba is the country's only outlet to the sea. The city houses numerous resorts and hotels and is famous for its Red Sea coral reefs. Wadi Rum is a valley cut into the sandstone and granite rock in southern Jordan; it is the largest wadi in Jordan. Popular activities in this desert valley environment include camping under the stars, riding Arab horses, hiking and rock-climbing among the massive rock formations.