Philadelphia Zoo has lit up three of the enormous 80-foot-tall trees at the Main Plaza with dazzling blue lights to thank the frontline. The new light display on the trees and front entrance buildings at 34th and Girard are illuminated with the goal of ringing in the holidays while also thanking healthcare workers and first responders during the global pandemic. By lighting up the front plaza in blue, the Zoo is extending its wishes for a peaceful holiday and its appreciation for the thousands of citizens throughout the greater Philadelphia region for their kindness, dedication, and courage during an exceptionally challenging year.