cliff cloud highland landscape milford sound mountain mountain range Natural landscape new zealand rock sky South Island water coast drift driftwood fallen fiord fiordland Haze mountains salt sea tide trees valley vista waterlogged wood panorama forest green peak snow vegetation animal aquatic Arctocephalus forsteri basking boulder Fur seal Kekeno mammal natural nature outcrop wilderness wildlife algae cascade fluid Fluvial landforms of streams lake moss plant spring watercourse waterfall Body of water Ecoregion water resources plants shoreline tunnel