There is a river in Phnom Penh that everyone is very familiar with, the Mekong River. Naturally, there will be a pier on the Mekong River, one of which is very close to the Grand Palace in Phnom Penh and the Four Arms Bay Scenic Area. So you can punch in the pier and the Grand Palace together, and the four-arm bay together. What I prefer is the quietness on the pier, watching the Mekong River slowly flowing together.