The Dead Sea is a very salty sea that lies between Israel and Jordan. It has a saltiness of 33,7%, which means that it is very easy to float in the water. One can almost walk. The salt comes from the low surface of the water. The surface of the sea is 423 meters below the sea limit. Thus, the only way for the water to get out is in the form of vapor, leaving the salt behind.
The Western Wall was built by Herold the Great in the year 19 BC. It is the most sacred site in Judaism outside the Jewish Temple itself. Today the wall is under Israeli control, but who's got the suverenity is disputed. Every hollyday tens of thousands of jews come to the wall to pray and mourn.