Longwood Gardens (Route 1, Kennett Square) presents the annual "A Longwood Christmas" exhibit through Jan. 12, with holiday concerts, thousands of outdoor lights and special events each day. Timed tickets are available and must be purchased in advance at www.longwoodgardens.org. Tickets are $18 for adults, $15 for seniors, $8 for ages 5 to 18, free for children 4 and younger.