We recently hosted some international geocachers on one of our guided walks. Geocaching is a free, high-tech treasure hunt, sort of a hide and seek with a smart phone. The goal is to find a small plastic box (cache) that contains a logbook and often small trinkets.
The geocache creator hides the cache somewhere outdoors and shares its longitude, latitude and other information on https://www.geocaching.com. When you find the cache you make a note in the logbook and on the website. If you brought a trinket, you can exchange it for one in the cache.
Apparently, there are 25,000 caches hidden in New Zealand (7.5 million worldwide) and quite a few in Puketi Forest. Our international guests located two of them during our guided walk. We wish them all the best with locating the other 24,998 in New Zealand.