Blue Hill, population 2,400, is easy to find -- just look for the dome of Blue Hill itself, which lords over the northern end of Blue Hill Bay. Set between the mountain and the bay is the quiet and historic town, clustered along the bay's shore and a little stream. There's never much going on here, which seems to be exactly what attracts repeat summer visitors; it might also explain why two excellent bookstores are located in this dot of a town. Many old-money families maintain lovely retreats along the water or in the hills around here, but the village center offers a couple of choices for lodging even if you don't have local connections. It's a good place for a quiet break.