MUCAL (Museo del Calendario)
Querétaro has a number of smaller museums with idiosyncratic themes, and this one with an impressively extensive collection set among the many rooms, courtyards, and gardens of a historic house in the city center is one of the best. Exhibits touch on the history of calendars and calendar-making in different cultures around the world. You'll also find a vast array of framed calendars from the past century or so, including quite a few kitschy ones depicting pets, families, and suggestively posed women that were often distributed as advertising material. There's a nice view of the city skyline from the rooftop terrace, and a small café in the peaceful back garden serves coffee and light food.