The name of this historic, 1843-dated mansion, "South of Broad", gives its address away. Now a chic living museum, the five-story 20 South Battery is sandwiched between High Battery and White Point Gardens, overlooking the harbour beyond. Find a private library, a sanctuary garden, and a two-story gilded ballroom — which becomes the venue for an afternoon social hour accompanied by artisanal cheeses and charcuterie.