When it rains heavily, the water turns yellowish-brown. There are two routes for the tour, with a fork at a point where several shops are concentrated. The birch forest route perfectly avoids the crowds and leads directly to the main attractions, but the downside is that there's a section with hundreds of stairs to climb at the end. The other route starts from the forest itself and is less strenuous, but it's very crowded. When I went, the road was under construction, so I had to take a detour.