Alaska's landscape is so vast and varied, sometimes taking to the air is the only way to really grasp its grandeur. Flight tours—sometimes called flightseeing—send you aloft in small planes that hold anywhere from two to eight people, or helicopters that hold two to four. Each tour may have a specific goal—for example, flying up to a glacier on the flanks of mighty Denali, or following the Iditarod from above—or just take you up high enough for a bird's eye view as the pilot talks about the rivers and glaciers snaking by beneath you.