Reindeer have been using frozen rivers as a pass way for thousands of years. However, many of these waterways have been impacted by man, making them extremely dangerous now.
Explore the resurgence of iconic wildlife and natural processes across Europe's most breathtaking landscapes, from the Arctic Circle to rich river wetlands, from deep forests to rugged mountain peaks.
Dozens of your favorite THIRTEEN and PBS programs are available to watch on-demand on many popular platforms.
LIVE