"During Christmas at Ohio's 19th-century Clifton Mill, nearly four million lights illuminate the building, the gorge, the bridges, and nearby trees. However, the most unique element is a 100-foot "waterfall" of twinkling lights. After experiencing the Legendary Lights of Clifton Mill, peek inside Santa's Workshop, where you might find the big guy checking his list. Stick around for the music show each night where the lights on the Old Covered Bridge flash in sync with the beat." - Travel + Leisure Editors