When night falls in Jasper National Park, Alberta, Canada, the mountains get a whole new backdrop. Designated a Dark-Sky Preserve in 2011, the park spans more than 11,000 square kilometres, with measures in place to reduce light pollution. Here, the stars, planets and the Milky Way put up a celestial show, giving visitors a reason to look up. Then morning arrives and the focus shifts from the sky above to the landscape below.