The Public Library
Favorite thing: Turn off the tube and read a book - I think they may even have a computer with internet access here!
Summer hours: the library is open in the afternoon, as long as the librarian is there to open the place.
Favorite thing: Isn't this building a perfectly simple representation of the Jeffersonian ideal of good government?
Or maybe you're thinking of John Winthrop's "City on a Hill"?