Lake MacDonald is one of the largest lakes in the US state of Montana, one of the cleanest lakes in the world, and a major habitat for trout. The lake was formed as a result of many erosion and glacial activities. The most amazing thing that may catch your eye on the shore of the lake are those colored stones formed from a group of rocks and pebbles in dazzling colors such as red, burgundy, green and blue that appear from under the surface of the water and on the shores of the lake in an amazing appearance that you will not find anywhere else in the world. It is precisely for this reason that some people call the lake a lot of names, including the Lake of Al-Halwa and the Lake of Colors. It is definitely one of the most beautiful lakes in the world, so do not miss the opportunity to visit it.