A satellite island in Stewart Island's Paterson Inlet, Ulva is a tiny, bustling world of a different sort than you may be used to. Only 3.5 km (2.2 miles) long and located off of the extreme southern tip of New Zealand, this open sanctuary is a refuge for a menagerie of rare birds with no fear of human tampering; meaning that they will hop right up to you or follow you around the three or four hours of walking trails that the island provides. There are a ton of diving and snorkeling opportunities on the north end of the island (Sydney Cove is a great spot; wear a wetsuit) and coves accessible by kayak or canoe on the southern end may reveal both sea lions and penguins. Transportation to the island is limited to ferry rides and water taxis from Half Moon Bay or Golden Bay on Stewart Island, while accommodation, diving equipment, and tours are available in Oban. Also, not only is Ulva Island a chattering bush world removed from civilization, but it's free. For more on this incredible day trip destination, check out the official website.
Note:Be aware that at this southerly latitude the weather can turn on a dime, so be prepared for cold, wind, and (especially) spurts of rain. Then again, sunshine and moderate warmth (up to 75 degrees Fahrenheit) can be had year round.