Sunrise at Maroon Bells, Aspen, Colorado, USA. The Maroon Bells are two peaks in the Elk Mountains, separated by about a third of a mile. They are reputed to be the "most-photographed spot in Colorado".
Trees across the Unites States are beginning to turn brilliant hues, heralding the arrival of fall. From buttery yellow to amber orange and burgundy red, leaves are turning all the colors of the rainbow as autumn chills the air.