Complex sentence: The area of Besano and the nearby "St. George's Mount" are an important palaeontological area: in fact the mount itself was recognized "World Heritage" in August 2010 because of the huge number of fossils discovered in its quarries during the years.
Split into simpler sentences: The area of Besano and the nearby "St. George's Mount" are an important paleontological area. The mount was recognized as a "World Heritage Site" in August 2010 because of the huge number of fossils discovered in its quarries during the years.