Lake Clock Screensaver 

Lake Clock Screensaver is a simple screensaver which displays a beautiful scene of a tranquil lake with a huge translucent analog clock over it. The screensaver shows only one image, but it is very attractive. It displays a tranquil lake with lovely weather, mountains behind and lots of pine tress. The image is static, and the only thing that moves a bit is the lake. Even though it is pretty simple with not so much variety, what I like most about this screensaver are the realistic and pleasant sounds of nature. You will hear the sound of the water flowing, different types of birds singing, and even a frog.

Unfortunately, it isn't very customizable since the only thing you will be able to change from the settings menu is its quality (low, autolow, autohigh, medium, high and best). Even in best quality it won't occupy the whole screen, but it's OK. It would be great if one could also set the exit conditions, since it exits with any action, and other features like more images or the ability to add music.

In short, Lake Clock Screensaver is a simple and nice screensaver, which doesn't offer much variety, but it may work for you.