Soar west from Fort Simpson via Twin Otter floatplane to Nahanni National Park Reserve—expanded sixfold ... You can descend into Canada's deepest ancient river canyons, reaching 3,000 feet ...

And much as the equally geriatric New River is the centerpiece of the worthwhile New River Gorge National Park & Preserve, the Susquehanna River is the setting of many of the Mid-Atlantic's best parks ...