Complex sentence: The ancient Mayan sites of Nim Li Punit and Lubaantun are each situated within a few miles west of the highway in southern Belize; the Cockscomb Basin Wildlife Sanctuary is several miles west of the highway in south-central Belize.
Split into simpler sentences: The ancient Mayan sites of Nim Li Punit and Lubaantun are each situated within a few miles west of the highway in southern Belize. The Cockscomb Basin Wildlife Sanctuary is several miles west of the highway in south-central Belize.