The Castle

This is a literal fort with thick walls with leftover items and stations. You’ll be able to use this as a workshop by completing the quest “Taking Independence”. It already has provisions for electric connections, beds, an unmanned clinic, crafting stations, leftover weapons, ammo, etc.

The radio tower itself has a copy of Guns and Bullets on the table. The radio tower requires 10 Power alone to power up Freedom Radio. You can tune in to this radio frequency with your Pip-boy

Castle Tunnels

If you cleared the rubble in what seems to be the general’s quarters in the East Tower, you can reach the Castle Tunnels. The pathways are filled with frag mines and there’s only one turret guarding the generator room. There’s a Fusion Core from the generator there, fusion cells, a chem station, and at the end, a Sentry Bot named Sarge. The security terminal will be inaccessible from this side so you have to go back to the castle. This tunnel is part of the quest “Old Guns” so if you already cleared it before the quest started, the quest will be easier to complete this time around.

Armory

This part of the castle will only be unlocked by completing the Old Guns quest. It has free laser turrets, artillery smoke grenades, laser musket mods, armor workbench, mini-nuke, weapons workbench, explosives, and ammo.