When Esme and I entered the town of El Limón Totalco on November the 26th, I spotted a group of cactuses. A building on the other side of the road was painted in two different colors of blue. Together with the color of the sky, I considered this a nice oppertunity to take a photo of some prickly pears (Opuntia species).
In the above photo you can see the purple fruit of the prickly pear, which is called tuna in Mexico. The young stem segments of this cactus are sold as nopales and used as a vegetable in Mexican cuisine.