"A generic National Park Service (NPS) brochure promises children, "Hidden within each national park is an exciting story waiting to be discovered. Learning the secrets of each national park is easy. Simply ask your teacher or Park Ranger..." This won't work at Hampton, an estate built just after the Revolutionary War and located just north of the beltway that circles Baltimore. The staff at Hampton insists it has no story to tell and merely preserves the architecture. I have taken several tours at Hampton; each ranger begins by saying something like, "Every National Park Service site has a historical reason to be in the Park Service, except this one." The NPS Web site groups its many sites under about 40 different topics. Many properties get multiple listings, but Hampton occurs only once, under "architecture."