stalagmites and stalactites in ruakuri cave, waitomo, new zealand

ancient aranui arch black bow candle cave cavern caves ceiling country formation glow glowing glowworm green heritage horizontal island light limestone mammoth national natural nature new north northisland northland park peaceful reserve rock rockformations rocky ruakuri scenic sedimentary site speleology stalactite stalactites stalagmite stalagmites stone underground waitomo zealand