Complex sentence: In addition to Penwith's status as a Heritage coastline, west Penwith, an area of 90 square kilometres, is considered an Environmentally Sensitive Area and is part of the Cornwall Area of Outstanding Natural Beauty (AONB).
Split into simpler sentences: In addition to Penwith's status as a Heritage coastline, west Penwith, an area of 90 square kilometres, is considered an Environmentally Sensitive Area. Penwith lies within the Cornwall Area of Outstanding Natural Beauty (AONB).