This is the third in our Hyrdo Obscura series, unlike the others this one is not hidden on the H sign itself but very close by. We're hoping it'll create a link between established caches and newer ones in the area, along the waggonways network. It has a different form of the Hydro Obscura sign to the previous two, one we've not seen all that often. It caught our eye and we like the variety. We've kept it simple - this one is a quick park & grab.