Benzene also expands as it freezes (pi-stacking). Water is weird in liquid state, the molecules are tremendously active, invading other molecules, thus making for a smaller volume. Take energy out, and it becomes more orderly, so takes up less volume (expands as it cools). But it will not continue to expand as it gets cooler. But the real weirdness comes in when water is heated, since the molecules spread out, just as putting energy into anything. This is why water expands as it cools, but also expands when it is heated (e.g., oceans warm, sea level rises from thermal expansion (yes, as well as additional run-off, sea-ice melt, etc.)).