DUFFIELD — It’s not too late to celebrate the holidays at Natural Tunnel State Park. In addition to the Lighting of the Tunnel, park staff have planned several other events to round out 2018 and bring in the new year. Remaining tunnel lightings If you haven’t had a chance to see the Lighting of the Tunnel yet, you can do so Friday and Saturday from 6-10 p.m. Tunnel lightings will also take place Dec.