Escarpment Trail in Porcupine Mountains Wilderness State Park, Michigan (© Pat & Chuck Blackley/Alamy)2021-09-25 上一页 文章 Cusco Cathedral on the Plaza de Armas, Cusco, Peru (© sharptoyou/Shutterstock) 下一页 文章 注入海中的馬更些河，加拿大 (© Norman Kuring, GSFC/NASA/USGS Landsat)
