Longwood Gardens was established on a former home of philanthropist and horticulturist Pierre S. DuPont. It features lush gardens of European and American design, the original DuPont house, several tree houses and a very large conservatory which is beautifully decorated for Christmas. The grounds are lit with many colored lights. We visited today. It was crowded and got even more crowded at evening fell and the beauty of the decorated trees shone. One video of, what else, trains below. Photos of the grounds are included in the Photos section.