PRINTS - LANDSCAPES HALIFAX & CALDERDALE AD120 AD129 AD135 AD136 AD140   AD140 - Summer at Ogden Water The flowers in the foreground of this picture are rosebay willowherb, which grows in abundance around this Halifax reservoir. Situated a mile or two north of Halifax, it is a popular area for walkers and has a large educational centre. It is a Calderdale ‘Countryside Gateway’ site, consisting of over 170 acres of mixed woodland.