Preah Khan is a 12th Century temple built for King Jayavarman VII. It is laid out in a grid-like pattern on perpendicular axes. It has a very long central corridor, through a series of doorways, through which we pass on our quest to find the famous hall of the dancers, or apsara. The layout seems a paradise for fans of first-person video games—spooky intersecting corridors where some monster might jump out at any second (although there were a few too many people around for monsters to be lurking today). It rained shortly before our visit, so it is very warm and humid, and puddles make the trekking a bit treacherous.