Balut is the ducks egg with the embryo inside. Unlike the Philippines where it is served plain, in Cambodia they serve it with flavoured salt and some herbs - the flavoured salt adds more taste to the "egg."
Meanwhile, when I was there a couple of years ago, the entrance fee to the Angkor Wat Temple complex is:
USD20 per head for a one day pass - no photo required.
USD40 per head for a three day pass - this one requires a photo to be attached to the pass.
In case you have not been informed, the Angkor Wat Complex has many temples. I spent two days there and saw only a fraction of the temples.