Castle on the Cliff - Plettenberg Bay, Garden Route, South Africa In the early 1960s a well-known civil engineer discovered one of the most beautiful places in the world ... a wild and dramatic sea cliff on Robberg at Plettenberg Bay. He built a wonderfully eccentric castle on the cliff edge, constructed stone by stone carried from the tumbled rocks below. Castleonthecliff.com~Site InfoWhoisTrace RouteRBL Check