This is highly debatable and open to hundreds of interpretations. It could be a sign that your secret hideout/passageway is going to be discovered or that you need to make a secret hideout/passageway.
There are seven secret passages leading out of Hogwarts, and multiple others varied inside of Hogwarts. The Vanishing Cabinets, one located at Hogwarts and the other at Borgen and Burkes, could also...
step on the air vent in The Tanglevine Jungle and click on the rope and grappling hook. When you have the grappling hook and rope, go to the Wildwood Glen and then click on the rope once more and...