Complex sentence: Further east, off the Whitby Road, is the Monks' Pond, formerly used by the priory canons as a fish pond, in which the priory arch is reflected--a dramatic vista that has often been photographed and painted.
Split into simpler sentences: Further east, off the Whitby Road, is the Monks' Pond, which--as the name suggests--was used by the canons as a fish pond. It presents a dramatic vista in which the priory arch is reflected and has often been photographed and painted.