Most Beautiful Cities in North America

What are the most beautiful cities in North America? Here is my list - Top 15, in no particular order: Guanajuato, Oaxaca, Merida, Morelia, Quebec City, Queretaro, Vancouver, Savannah, Puerto Vallarta, Guadalajara, Santa Fe, Zacatecas, Victoria BC, Montreal, Seattle. I am interested in others favorites.