I spent my first day in Sri Lanka walking around Galle Fort. I had no map or guide book and I just wandered. It was wonderful. I recommend going early though, I went mid day and it was HOT! I recommend a hat or umbrella to shade yourself (I had neither, stupid!). Don't miss the Lighthouse, how could you? Walk along the ramparts...and just get 'lost' in the little alleys while checking out different galleries, shops etc. Have lunch at Amangalle if you're not staying there.