You're in an unknown area, but you see a tunnel. You go through it, and there's a moat that's lava, and the only way across are unstable large dirt rocks. Then, you reach it- Hallow Castle. There seems to be no one where. You walk in, and there's stairs leading up. Go up there, turn around, there's a room. Not just any room, the king's room. It has a royal chair. Climb that, and you now have roof access. From there, find out how to get out.
(AFTER THE PLACE BEHIND THE WATCH TOWERS, THE GAME ENDS. IT'S STILL A WIP!)