bizarre pillar rock formations, natural erosion of clay silt stone canyon cathedral gully cliffs canterbury new zealand

geology rock formation landscape nature outdoor lookout cathedral gully kaikoura canterbury zealand gore bay coast cliff park stone ocean sea forest tree walkway viewpoint panorama hill mountain sand pillar erosion gorge canyon clay hurunui tasman pacific aotearoa weather green orange brown column badlands travel tourism attraction sightseeing south island scenery silt steep bizarre formations natural cliffs pillars columns