This park is a unique experience, definitely a destination that you should visit if you have the chance. There are white sandy beaches, wildlife and the sunset view is amazing. Here are some ecological reserves: http://mipagina.1001consejos.com/profiles/blogs/top-10-reservas-ecologicas (Kruger park and Xcaret are my favourites).
The best way to visit the Abel Tasman National Park, which includes a marine reserve, is by walking and kayaking. It can even be turned into a several day trip by staying in their basic accommodation although there's no hot water and even drinking water , electricity or mobile coverage. The reward is to row between seals, crossing rivers, lagoons and estuaries virgins see abundant wildlife and birds, both marine and terrestrial. Abel Tasman Kayaks is one of the best companies to offer these tours because they handle everything.