When National Geographic Adventurers of the Year Amy and Dave Freeman marry, they set out on an unusual honeymoon: a three-year, 12,000-mile journey across North America. From Alaska's Inside Passage to Florida's Key West, they traverse the continent by kayak, canoe, dogsled, and skis, encountering wildlife, sublime landscapes, and harrowing challenges.

Along the way, the Freemans also bear witness to environmental degradation and climate change--from plastic-covered beaches to forest fires to retreating glaciers. And as they engage with Native and rural communities most impacted by the changes resulting from modern industrial society and meet individuals and organizations dedicated to protecting the natural world, their adventure deepens in ways they never imagined.