The "North" Pole

Everything in the Park looks like it belongs. The cabins are log. The yurts are canvass. The signs are rustic. The buildings are painted in earth-tones. Nothing seems to "stick out" or says "I don't belong here." But for one thing. There is a bright blue pole. I call it the "North Pole" for lack of a better name. It is in the middle of the Park and I have no idea why it's there. From one side it looks like any other 4 foot pole made from culvert-type material. From another angle the pole reveals a secret. It has a hatch with a lock. When I walk by the pole I always wonder what is under the hatch. Why is it protected with a lock? Do you have any ideas!?