Last stop in my spring road trip across the American West: the breathtaking Great Sand Dunes National Park, in Colorado. I only had a full day there, but so many things to capture and enjoy. From the howling coyotes that woke me up in the middle of the night under a full moon, to the relentless wind and menacing thunderstorms, this place is always a challenge. Which makes the images you make there the more rewarding.