What do I mean by that? Well, try to escape the flow of tourists as much as possible. Go inside, look for some unusual angles and vantage spots. Go abstract – find a beautiful wall, or texture, or a shadow shape. Wait for something different, whether a beam of light, or an animal, or even a person to pass by. Yes, people in your pictures can liven them up, not ruin them, if you shoot them correctly (not literally). In general, people photography just about the only way you can take some unique shots on your trip. But what if you are shy to take pictures of strangers?