Complex sentence: It is notable for being the start point of the Ridgeway National Trail and for several round barrows (burial mounds) on it and for being the site of a wooden circle known as The Sanctuary that indicate human activity for thousands of years.
Split into simpler sentences: It is notable for being the start point of the Ridgeway National Trail. There are several round barrows (burial mounds) on it and it is the site of a wooden circle known as The Sanctuary indicating human activity for thousands of years.