Dead Sea
You've probably heard of the Dead Sea and its unearthly characteristics... First and foremost, it is by far the lowest point on the planet, at around 400 meters below sea level. This is evident by how far you must drop to reach the water. You may also sense the region's heat, dryness, and aridity, as it is one of the most inhospitable areas on the planet.
The most amazing element of the lifeless sea, though, is its water. The dead sea's saline water is ten times saltier than ocean water. This makes it extremely dense, tough to dive into, and extremely easy to float. Going to the Dead Sea is a must-do experience in Israel since it is unlike anything else you will ever do. It's also completely free! Ein Bokek's beaches are open to the public and feature changing facilities and showers!
Please keep in mind that the water is extremely salty! It will burn if you have open wounds, it will go to your eyes (and possibly your lips), and your skin will feel strange afterwards.