We will be arriving from Vienna in the early afternoon at the main train station in Prague and we are thinking of staying in a hotel within walking distance of the station. If normal "tourist" precautions are taken, is this a safe area to be walking around in? What about in the evening hours? If not, which areas are the safest? After reading all the taxi horror stories, I thought it might just be easier to walk. Also, any recommendations on transportation to the airport when we leave?