The sea known for its high salt concentration is the Dead Sea. Located between Jordan and Israel, the Dead Sea has a salt concentration of around 30%, much higher than that of regular seawater, which averages about 3.5%. This extreme salinity creates a unique environment where few organisms can survive, hence its name. The high salt content allows people to float effortlessly on the surface, making it a famous attraction for tourists. The minerals found in its water and mud are also believed to have therapeutic properties, attracting those seeking health benefits.