From Wikipedia:
The Dead Sea (Hebrew: ים המלח, Sea of Salt; Arabic: البحر الميت) is a salt lake between the West Bank and Israel to the west, and Jordan to the east. It is said to be the lowest point on Earth, at 420 m (1,378 feet) below sea level;[2] its shores are actually the lowest point on dry land, as there are deeper points on Earth under water or ice. At 330m deep (1,083 feet), the Dead Sea is the deepest hypersaline lake in the world. It is also the world's saltiest body of water apart from Lake Asal in Djibouti; with 30 percent salinity, it is 8.6 times saltier than the ocean.[3] The Dead Sea is 67 km (42 miles) long and 18 km (11 miles) wide at its widest point. It lies in the Jordan Rift Valley, and its main tributary is the Jordan River.
The Dead Sea region is also an ideal base for touring Israel. Travel distances are short, with Jerusalem only in hour's drive, Tel Aviv, Tiberias 2 hours away and only 25 km from Arad.