Mirador de Jaffa
You absolutely cannot miss this spot. You begin on the Tel Aviv promenade and following it south, you come to Jaffa. Just before reaching a viewpoint it delves a bit into the sea, giving a beautiful view of both the historic Jaffa as the skyscrapers of Tel Aviv to the other side. It is also a good point, as well as the rest of the boardwalk, to see the sunset over the Mediterranean.