The Dead Sea forms part of the border between Israel on the east and Jordan on the west. Sitting some 400 or so meters below sea level it is known as the lowest point on earth. Swimming in this body of water which is some 8 times saltier than the ocean is an experience you have to enjoy.
Imagine being unable to sink no matter how much you try. Just remember to abide by the warning signs and don’t immerse your head, dive into or drink the seawater. I have also been told not to fart in the water for similar reasons but I wasn’t game to test that theory myself.