We haven't been here yet, but it's on the list!
Climb up Taitomo Island, and head towards this gps marker. There was only 1 review which is below which has since been deleted. Please only attempt this if you are familiar with this area, please don't go alone, let someone know where you are going and be careful :)
From a reviewer:
'Beautiful spot to watch the sunset! It's definitely a hidden gem - it's tricky to get there and it's a very small spot too but it's worth it for me. Just be careful when going up the hill and have always an eye on the tide times! Would recommend to bring a small camping chair or something soft to sit on as the rocks are quite hard and sharp if you sit there longer '