Camden-place, home of The Elliots. "Their house was undoubtedly the best in Camden Place" which means it was most likely the house beneath the pediment. The pediment is not located in the center (as was usual) because more houses were to be built, but the land proved to be too sandy and unstable and so further building was abandoned. Kind of poetic, isn't it? ;-)

Linked below is the Persuasion Gazetteer for the city of Bath in Austen's time. It will help you get a general layout for the city, and you can click on specific streets mentioned in the novel to view of close-up of the area. This is a great tool for comparing, say, where the Elliots live in Camden-place to Lady Russell in River St. to the Darymples in Laura Place to poor Mrs. Smith in Westgate, etc.