Don't make the mistake of thinking that there's nothing more to this part of the citadel of Angkor Thom than the top of the terrace and the exterior wall - there is also an interior wall which only came to light in the 1990s, and which had been protected by another wall in front of it. As you walk through what is a kind of roofless tunnel, you will see all sorts of carved figures in very good condition - devatas, demons, and strange beasts. They date from the 12th century and were carved about the time that the nearby Bayon Temple was constructed.
I am not sure that there is ever very good lighting on these carvings, but a camera which copes well with low light should be able to take some good pictures; black and white makes for some quite atmospheric shots.
The exterior wall nearby is also worth a look but, because the carvings have been exposed for much longer, they are also quite weathered.
Not too busy as most other visitors are busy looking at the elephants on the neighbouring terrace!