Leur Lake is a lovely place to get away from the fast pace of daily life. See if any water activities are on offer here, or simply soak up the peaceful ambiance.
You'll want to have your camera handy when you're visiting this body of water. It draws many travelers who come to Sen Monorom. Also deserving of a few photos is Mondulkiri Project. Close to Leur Lake, it's another of this area's highlights.