the main roads through Waterton-Glacier international Peace Park aren't just a means of travel: They are two of the parks'main attractions, and some of North America's most popular scenic drives. In Montana's Glacier Nation Park, visitors flock to the 50-mile (80 km) Going -to-the-Sun Road, which snakes its way around the park's dramatic mountains.The rode is so popular that there's often traffic-one of the reasons to enjoy the views through the windows of a shuttle bus, which you can hop off at one of its many stops and hike out on some of the 70 miles (1,130 km) of magnificent trails. In Waterton Lakes National Park in Alberta, the Entrance Road provides a spectacular introduction, winding through the prairie of Wales Hotel, with dramatic vistas over the Waterton Valley. Both roads are teeming with wildlife, including wandering black and grizzly bears.