New Zealand has a number of well known Peninsulas. Being from Christchurch, I know Banks Peninsula well. Otago Peninsula is wild and spectacular. I've done caches on both (Mystery in the Chasm is a memorable one). I haven't cached Coromandel Peninsula yet, but I'm sure there are great caches there too!
While streetwalking in Petone, I came across a peninsula rather smaller than those listed above (big enough for just one cache). While small, it has a good track along its entire length, and a pole (and seat) at the end.
My original plan was to put a magnetic cache under the seat. When I tried that it turned out that the seat was the wrong type of metal (doubtless steel would quickly rust here). Plan B was to continue 9 or 10 paces past the pole, and use a 200ml sistema. That cache disappeared. Plan C was an M&M tube sitting inside another tube, a couple of metres from the pole, a little above ground level, and in clear view. That got muggled too, as did Plan D (a pill bottle tied to one of the bushes a few metres past the pole) and Plan E (a pill bottle suspended from a wire loop in the same bushes).
So, time to hit it with a sledgehammer (yes, a flax bush hide). In Plan F the hide is a mini-pole (a berocca tube) hidden under a small pile of rocks. Stand West of the pole, with your back to the pole, looking at the boatsheds. There should be two flax bushes in front of you with touching leaves. The pile of stones is between the two bushes. Replace the cache carefully, with the top stone fully covering the cache, and resting on the other stones (and not the cache).