P.C.Hooftlaan 13 2332 AX Leiden, Nederland
Deijlerweg 163 2241 AE Wassenaar, Nederland
You can enter through the small fence of Adelbert College. After you enter the building, go to the left.
Follow the building (picture 2) till you are at the schoolyard.
At the other side of the schoolyard, you have the entrance (the last 2 folding doors). After entering, go right and walk through the hallway. You can enter the gymthrough the last 2 lockerrooms
!! CAUTION !!
Don't open the last doors at the end of the hallway.
This can trigger the alarmsystem.