日期:2016/03/15I took this image at Great Sand Dunes National Park in April of 2014. The Sand Dunes, in Southern Colorado, are the tallest dunes in the United States. This image is a still taken from a timelapse.分辨率:3840×2400设备:Canon EOS 5D Mark III, Canon EF 70-200mm f/2.8L IS II USM.