Jutting out about 115 feet (35 meters) from a cliff face, with a thick glass bottom, the Columbia Icefield Skywalk offers a clear view of Jasper National Park’s Sunwapta Valley 918 feet (280 meters) below. As one of the project’s engineers put it, “It’s surreal to be projected off a sheer cliff face with nothing but glass under your feet.” And, yeah, probably so. But the Skywalk also offers a chance to see the park from a whole new angle. Opened in 2014, the Skywalk is a u-shaped observation deck…