Swim at the Dead Sea
The Dead Sea holds the Guinness record of being the lowest dry place on the planet, and is currently at the altitude of about 430 Meters below Sea Level (some 1400 feet).
The lake is also known as one of the saltiest bodies of water on earth. Besides salt (over 30%), the Dead Sea also contains many minerals, and bathing in the Dead Sea as well as implementing its black mud is known for therapeutical value, as well as having rejuvinating effect on human skin.
Besides the health benefits, bathing at the Dead Sea is an exceptional experience as the body floats at ease, and a photo with the body covered with mud is the ultimate feed to your Instagram account :-).