A magical barrier was placed by the boy around the secluded area, which was protected from sight by various corners. No on is able to get close enough to see, even if they aren't fooled by the basic repelling charm, and the barrier seems to send of a calling for one person: Helios Sunrider. To everyone else, except maybe the experienced wizard, nothing is out of place. Only Helios can get through, no one else can see or reach the area in which the boy Jake Upstead is currently hidden.