Yellowstone’s Grand Prismatic is one of those places that seems other-worldly, especially in winter. The famously bright colors of the Grand Prismatic Spring are muted in winter and partially covered with snow. There are few trees close by and the snow-covered boardwalk can be treacherous when the winds gust. Looking out over the vast landscape of bacterial mats that populate the area and surround the Grand Prismatic Spring, interesting patterns are visible. What is even more fascinating is that Yellowstone’s wildlife can leave lasting impressions in the mats. On our last day in the Park, prints from Wolves and Bison were clearly visible but not the animals themselves although a lone Coyote lurked in the steam in the distance near the spring as we walked by.