Mostly just Niagara, but my wife and I did visit a winery near Jerome, AZ that sold Caduceus wine (owned by the lead singer of Tool).

Oh, wow. Napa and Sonoma Valleys, every region of Italy, France's Loire Valley, Burgundy and Alsace, Germany's Mosel, Baden, Franken, Pfalz, Rheinhessen, Rheingau, Nahe and Württemberg; various parts of Maryland and Virginia...it's a long list.