5 Oct 2012 The guide book had another walk called "The Mystery Coast". Along the way it mentioned a tunnel left over from the military days.
The entrance was marked "No Entry" but there was no barrier and I took a chance.
The inside was kinda cool, it even branched at one point. The guide book said you could go all the way through and emerge next to the visitor center.
I had only a tiny pocket flashlight with me and I wanted to see the outdoor area so once I got a feel for the place I just turned back.