Small-Group Holiday Tour of Philadelphia's Center City. Take a 3-hour holiday walking tour of Center City, the heart of Philadelphia and home to its central business district — both beautiful and bustling as the second-most-populated downtown area in the U.S. During the holiday season, it comes to life like at no other time. Visit festive staples like the Christmas tree at Rittenhouse Square; the Wanamaker Organ, with its seasonal show of lights and sound; and the Christmas Village at Love Park, among many others. A variety of foods are available for purchase along the way. Tour is limited to 12 participants. Book and Save 30%! Small-Group Holiday Tour of Philadelphia's Center City.