These snaps capture true winter wonderlands – as Mother Nature's icy grip takes hold of America's National Parks. From snow-capped mountains in Yosemite to an icy still Glacier Bay, the incredible images show their beauty is year round. In other breath-taking shots crisp frost lines the paths through Great Smokey Mountains and Crater Lake has had more than a dusting of snow. Each stunning shot was collated by the U.S. Department of the Interior – the agency which protects US land, water and wildlife. Tim Fullerton, Director of Digital Strategy, said: “America's public lands are just as beautiful this time of year as they are in the warmer months. Snow and ice turns national parks, wildlife refuges and other public lands into a winter wonderland, enhancing the beauty of nature in America's great outdoors”. Here: Apostle Island National Lakeshore Park in Wisconsin. (Photo by U.S. Department of the Interior/Cater News)

The last light of the day falls on the Tatoosh Mountains and Mount Adams, as seen from the Skyline Trail, Washington. (Photo by U.S. Department of the Interior/Cater News)

The Arapaho National Forest in north central Colorado. (Photo by U.S. Department of the Interior/Cater News)

Grand Teton National Park is a United States National Park in northwestern Wyoming. (Photo by U.S. Department of the Interior/Cater News)

Bison walking through deep snow near Tower Jct. in Yellowstone National Park in Wyoming. (Photo by U.S. Department of the Interior/Cater News)

Conway Summit in Mono County, California. (Photo by U.S. Department of the Interior/Cater News)

Denali National Park and Preserve in Alaska. (Photo by U.S. Department of the Interior/Cater News)

Denali National Park and Preserve in Alaska. (Photo by U.S. Department of the Interior/Cater News)

The Half Dome and valley is covered in snow in Yosemite National Park, in California. (Photo by U.S. Department of the Interior/Cater News)

Glacier Bay National Park and Preserve in Alaska. (Photo by U.S. Department of the Interior/Cater News)

Great Smoky Mountains along the Tennessee–North Carolina border. (Photo by U.S. Department of the Interior/Cater News)