Keep off the grass

Yes, sure it's cold, walking from the Visitors' Center at Longwood Gardens up to the Conservatory in 23-degree weather with strong winds. But you still ought to walk on the path, not across the lawn, as my mother saw some visitors doing the other day (she reports that they appeared to be young and not infirm in any way). Maybe they didn't realize that the colder you get, the more fun it is to walk into the tropical, eyeglasses-steaming warmth of the Conservatory.