If you love tacos you absolutely MUST eat at Los Trompos taqueria. They are the best tacos in the Yucatan if not all of Mexico. Try the queso fundido, carne queso, torta al pastor, tacos al pastor, nachos, I could go on. Last time I was there they had two locations, one just out of Garcia Jinerez that opens in the evening(its an old colony with tons of beautiful old french style mansions that you shouldn't miss) and one in one of the shopping malls (sorry I don't remember which one). I'm sure if you asked you could find your way to either, or if you are really interested I can call some friends in Merida and get directions for you. There are other places I would recomend but I don't want to send you too far into the "hood" if you know what I mean. I can't reccomend any more formal dining places because when I'm in Merida I just eat at friends homes (which is ten times better than any restaurant, and free ). Also don't forget to eat a bunch of marquesitas on the street (a thin waffle cone batter filled with melted edam cheese from Holland and rolled up to be all gooey and crispy. Are you going to see any ruins? Try the Ruta Puuc which is a circular road with 5 or 6 ruins on it (Uxmal is the most famous but people rarely see the others Labna Kabah etc.) You start with Uxmal and drive for about 45 minutes total and end up back at Uxmal (I hope that makes sense). I know the area pretty well so if you have any more questions feel free to ask.