Switzerland is known for its scenic mountains and beautiful waterfalls. A visitor to that picturesque country observed: "Some guidebooks name the time when rainbows may be seen on many of the waterfalls in Switzerland. One day, when I was at Lauterbrunnen, I went to the famous Staubbach Falls and watched and waited. Others did the same, and we all went away quite disappointed. The next day one of my friends said he would show us how to find the rainbow. So I went again and saw a lovely one, and stood almost in the center of it. Then I found that not only were sunshine and spray necessary to produce a rainbow, but also that it could be seen and enjoyed only at a certain point."