Open Wilderness Guiding Book The Open Wilderness Guiding Book The Open Wilderness Guiding book instead of giving you instructions about where to go and what to do it gives you suggestions about ways to think and see. Get the book. How to use it Pick a route techniques - e.g. a compass Use a few of the other techniques whilst on the way Share your findings Geocaching The process of hiding a treasure and marking it with a GPS waypoint so others can find it. Or just hiding something that others can find. Urban Exploring Urbex is the practice of exploring disused, hidden and derelict places in a city and writing, taking photographs and making films about the process.