Next month I have a business trip to Tel Aviv, Israel with a stop on the way back in Lisbon, Portugal for a couple days. I've been to Tel Aviv before, but this will be my first time in Portugal and I want to make the most of my short time there. Has anyone been there before? Are there any "must see" things in or around Lisbon? I'll only have about 6-8 hours of personal time there but I want to see as much as I can.