This 1892 Art Nouveau villa hotel, named for the Italian publishing family that used to vacation here, has attracted the likes of Winston Churchill, D.H. Lawrence, and Benito Mussolini. Surrounded by private gardens and overlooking the lake, the villa has been meticulously and opulently restored, with frescoed ceilings, wood paneling, antique ceramics, and original tile floors. The rooms are palatial and equipped with every luxury (as befits the final bill). If you can afford it, take the tower room, or one of the independent guesthouses if that's your style. There's an extensive library open to guests.