Luang Prabang literally meaning "Royal Buddha Image", is a city in north central Laos, consisting of 58 adjacent villages, of which 33 comprise the UNESCO Town Of Luang Prabang World Heritage Site. It was listed in 1995 for unique and "remarkably" well preserved architectural, religious and cultural heritage, a blend of the rural and urban developments over several centuries, including the French colonial influences during the 19th and 20th centuries.
The cache is located underneath one of the bridges over a small canal ending the Mekong river. You will pass this bridge on your way to the Kuang Si Waterfalls, south of Luang Prabang. Be carefull when searching for the cache, there's no need to go down entirely, the cache is located in the construction just underneath the road.