Here like a maze of underground passages crisscrossed, in all directions, the passages are arranged on both sides of the stone houses, respectively living rooms, kitchens, chapels, galleys, stables, etc., you can see the passage walls chiselled with call holes and shelving lighting walls. The passage between the layers has a large disk with a diameter of more than 1 meter, it is said that as long as the trigger is set up, the round stone disk will seal the hole.