09-26Watkins Glen State Park's Rainbow Falls in the Finger Lakes region of upstate New York - Kenneth Keifer/Alamy)
09-25Ceiling and cove of the Great Hall at the Library of Congress in Washington, DC - Susan Candelario/Alamy)
09-24Cows decorated for the Almabtrieb in Tannheimer Tal, a valley in Tyrol, Austria - Hans Lippert/Alamy)
09-23Golden ginkgo leaves at Xuanwu Lake Park in Nanjing, Jiangsu province, China - SIPA Asia/ZUMA Wire/Alamy)
09-21The Ship of Tolerance, an international art installation in Zug, Switzerland - Linda Kennard/Alamy)
09-17The US Constitution and the Declaration of Independence on display in the National Archives, Washington, DC - Carol M. Highsmith/Buyenlarge/Getty Images)