Few monuments in the world leave you in the trance that Angkor Wat does because it seems like you have chanced upon an ongoing archaeological excavation of temples set in pristine jungle. Our guide, Ly Sarith, duly seemed much more a high priest than someone in the travel trade. When he told us of the sacking of Angkor by kings from Thailand in the fifteenth century in that setting, the story had the feeling of a religious revelation. This was partly because as he took us around the complex he was prone to moments of contemplation, with his palms pressed together, before he told us about each temple.