Once again a local orienteering club is volunteering in a 15th year annual urban hike event, in which enrichment to the already-existing event is made by providing some orienteering maps and placing 10 controls.
From past experience, it is expected that among the 300+ participants, only 40 will actually take with them the orienteering map and find the controls.
There are two #4s on that map. No wonder no-one wants to take it with them.
that second #4, off the red lined route, is where you will find a UFO. It's the equivalent of the fabled Area 51
Photos of the event in this album