I have placed the boulders on the two locations indicated by the telescope but without any consequence. Is there an additional condition needed to trigger an action?
There are 3 boulders to be placed.
Look in the other building for the other position.
Maps and videos in here https://forum.pixelfederation.com/diggysadventure/t/pirates-2
Ah, thanks. I had placed that third boulder before but moved it again.