Final answer:
Xunatunich, Altun Ha, and Caracol are Mayan ruin complexes located in Belize, with Caracol's Canaa being the largest pyramid.
Step-by-step explanation:
The country that has the Mayan ruin complexes Xunatunich, Altun Ha, and Caracol is Belize. Caracol's Canaa is the largest pyramid in these complexes. Xunantunich is located in western Belize near the Guatemalan border, Altun Ha is located in northern Belize, and Caracol is located in the Cayo District of Belize. These ruins are significant archaeological sites that offer insights into the history and culture of the ancient Mayan civilization.