Mount Phou si

Mount Phou Si, also written Mount Phu Si, is a 100m high hill in the centre of the old town of Luang Prabang. It lies in the heart of the old town peninsula and is bordered on one side by the Mekong River and on the other side by the Nam Khan River. The hill is a local religious site, and houses several Buddhist shrines.

Halfway up the hill, overlooking the Nam Khan is Wat Tham Phou Si, a Buddhist temple. At the summit of the hill, overlooking the town and surrounding countryside, is Wat Chom Si, which is also a Buddhist temple and is a tourist highlight of Luang Prabang.

Visiting

The hill is popular as a place to watch the sun rise or set over the Mekong River. From the summit you can enjoy a spectacular 360 degree outlook across the city and its many temples, and out over the surrounding landscape to the mountains in the distance. Count on spending a couple of hours for the climb and descent, with several stops to see the temples, rest under the shady trees and admire the magical views.

There are hundreds of steps to negotiate, the Thanon Phousi staircase consists of 355 steps that zigzag up to the summit, but it is well paved and offers several resting places along the way and the climb is gentle enough for anyone who is in reasonable health. Halfway up the hill is the Wat Tham Phousi shrine, which features a big-bellied Buddha nestled in a grotto and a reclining Buddha.
At the top of Mount Phousi is the golden Wat Chomsi, which was built in 1804. For a complete experience, go up Mount Phousi on one side and use the other set of steps to make your way down again. You can pray and make offerings at several temples along the way. Next to Wat Chomsi at the top of the hill you can buy flowers to offer for blessings, as well as caged birds. The Lao believe that if you set a bird free you will enjoy good luck and happiness in the future.

• Opening Hours: There are no set opening times, but it is best to visit Mount Phousi during daylight hours. You will have no problem making your descent in the evening after viewing the sunset, however.
• Location: Mount Phousi rises above the centre of the old town of Luang Prabang, and is situated between Thanon Sisavangvong and Thanon Phousi. From its peak you can look out over the entire city and beyond, with the Mekong River to the north and the Khan River to the south and east.
• How to get there: You will find a set of steps leading up to the top of Mount Phousi opposite the Royal Palace Museum on Thanon Sisavangvong, and another entrance on Thanon Phousi, near the Hive Bar.

Source https://en.wikipedia.org/wiki/Phou_si

http://www.visit-laos.com/luang-prabang/mount-phousi.htm