Thanks @SenatorHassan! We may not have ocean-front beaches in Colorado, but we do have the tallest dunes in North America! This is Great Sand Dunes National Park. @SenBobCasey, where's one of your favorite places in PA? #TravelAndTourismWeek https://t.co/I6LKX0DdDG https://t.co/KcAaAsdJlt