Complex sentence: The town is close to the mouth of the Kingsbridge Estuary, built mostly on the steep west side of the estuary and lies within the South Devon Area of Outstanding Natural Beauty (AONB).
Split into simpler sentences: The town is close to the mouth of the Kingsbridge Estuary, mostly built on the steep west side of the estuary. IT lies within the South Devon Area of Outstanding Natural Beauty (AONB).