A castle on a beach in South Africa is not a familiar sounding thing. Yet if you’re in the Knysna area, take the dirt road at Nekkies down towards the coast, walk the 150 steps marked ‘beach’ and you will find exactly that: a secluded cove, castles with turrets and classic beach cottages.     Noetzie Beach has remained a favourite destination for adventure seekers in the past and remains so to this day. The pristine and relatively isolated sandy shore is in the Sinclair Nature Area, and is…