Angkor Wat is a magical place. I watched the sunrise and it was incredible. The place is huge with a lot of stairs. If you want to take tons of pictures I will suggest you go by yourself so you better not take a tour, except if it's a private one. During summer it's really hot so prepare water, sunscreen or an umbrella. You can't wear t-shirts, tank tops or anything with your shoulders uncover and for the bottom, you must wear something long or at least at the knee level.