Each month, National Geographic magazine features breathtaking photographs in Visions of Earth. Browse through visions of the world as seen through a photographer's eye. Brandenburg is balmy if you’re in Tropical Islands, a theme park housed in a 710,000-square-foot former aircraft hangar. Although the temperature in this pleasure dome is a perpetual 79°F, light levels vary due to a section of transparent roof panels. A Eurasian beaver heads for her lodge in the Loire River, hauling a poplar branch for supper. A century ago hunting had nearly wiped out this species: Just 1,200 were left. Today a million of these protected rodents thrive, mostly in Europe. Champion strong man Gregor Edmunds lets fly a 16-pound shafted hammer at the Cowal Highland Gathering. The annual three-day event in Dunoon—featuring traditional games, music, and dancing—is open to international competitors.