Luang Prabang, Laos, December 2012. Phu Si is a 100m high hill in the centre of Luang Prabang. After climbing 328 stairs, we reach the summit of the hill, where we find Wat Chom Si, a Buddhist temple, which is one of the main attactions of this old town. The gilded stupa of Wat Chom Si seems to be looking at the sky.