Complex sentence: Within the parish boundaries lies Bream Wood, a designated Site of Special Scientific Interest, comprising an area of woodland with a ghyll hosting several species of fern and moss not found elsewhere in the area.
Split into simpler sentences: Within the parish boundaries lies Bream Wood, a designated Site of Special Scientific Interest. This is a woodland with a stream (ghyll) which hosts several species of fern and moss that are not found elsewhere in the area.