Nahanni National Park Reserve Northwest Territories
Prepare to get your feet wet: This 11,600-square-mile UNESCO World Heritage Site is home to countless rivers and streams. Most impressive: the South Nahanni, which winds through the four towering canyons it carved in the heart of the park. Kayak, canoe, or raft its rapids, hike along its banks, scale the walls of the granite Mackenzie Mountains Ragged Range, or cast in the river's riffles and nearby lakes. Afterward, soak in the Kraus hot springs.
There are no roads into the park, so charter a floatplane from Yellowknife or Fort Simpson.