Definitely make the trip to the Masada fortress, climbing to the top to catch the sunrise over the Dead Sea. But be forwarned - bring some water - even @ 7am you'll be sweating like a dog in the heat. (Okay, that's based on my visit in September, I don't know, February might be cooler.) The view, as well as the setting out in the desert, is remarkable and desolate. There are countless agencies in Jerusalem that arrange day trips to Masada.