I'm your grandfather

Alex and his group had easily reached safe house 11, seeing as the escape route Alex had made was actually directly heading there. It took the group three hours of continuous walking to reach the end of the tunnel.

The moment they surfaced from the tunnel. What greeted them was a warehouse filled to brim with weapons. It turned out that the exit of the tunnel led to the weapon storage area of the safe house. This was made so that Alex could quickly get a weapon if someone was chasing him through the tunnels.

...

Once everyone had surface Alex proceeded to show the people with him around the safe house. He showed them where the food storage was located, where the rooms were, where the bathrooms were, and all the other things. He showed them how to operate the numerous defensive systems in the safe house. Out of all of Alex's safe houses this one was the most secure, and the biggest. With the supplies inside this safe house, it could feed all the civilians for the whole month.