The sea that is known as the world's saltiest is the Dead Sea. Located between Israel and Jordan, this salt lake is famous for its extremely high salinity, which is about ten times saltier than normal seawater. The high salt concentration allows people to float effortlessly, and the mineral-rich mud is used for therapeutic and cosmetic purposes. The Dead Sea is also the lowest point on Earth's surface, situated around 430 meters below sea level, contributing to its unique geographical and ecological characteristics.