CancuÃ n is an archaeological site of the pre-Columbian Maya civilization , It can be found in the PasiÃ n subregion of the central Maya lowlands . It is located in the present-day Guatemalan Department of El PetÃ n. The city is famous because it has one of the largest palaces in the Maya world . CancuÃ n is an archaeological site of the pre-Columbian Maya civilization , located in the PasiÃ n subregion of the central Maya lowlands in the present-day Guatemalan Department of El PetÃ n. The city is notable for having one of the largest palaces in the Maya world .