The colorful pools of hot springs in Yellowstone can be quite stunning to see.  Visiting in the deep of winter means they are surrounded with snow and ice but a lot less people.  The colors are still there but the low temperatures mean that clouds of steam form above the surface.  Gentle gusts of wind might briefly blow the steam away to reveal the intense colors beneath but the steam rapidly returns.  As you look into the pools you can see the colors well but it makes for a harder time getting photographs.  You give it a try but then just spend time enjoying the impressiveness of the pools.