Dreams Pt. 6- Attics,Basements,and Skies

I had a dream the other night where I was in a house, and there was a room in the attic, accessable by a pull-down ladder and a trapdoor. I don't remember much else about this dream...it was one of those dreams where nothing really happens. What it does illustrate is that a recurring theme in my dreams is houses or apartments with weird features. Sometimes it's an attic like my dream the other night. Often it's a basement, that goes on and on, and gets deeper and deeper, with doors leading to sub-basements. At least once I dreamt of a huge house I was visiting that I got lost in, wandering through room after room. It was kind of cool seeing all these different rooms, as if the house was growing as I passed through it.
Another element that pops up on a fairly regular basis in my dreams is the sky. The sky often looks , well, bigger in my dreams...it's hard to explain. Also, the sky will often be a strange color, or there will be something going on, like huge images being projected into the sky, or comets and giagantic planets looming overhead. At times there's ominous thunderclouds or tornadoes. And in one dream, the night sky cast a dark blue light over all, and I found a black sword impaled in the ground, in a field of knee-high grass that swayed in the gentle night wind. I took the sword and went home, the breezes the only sound as I walked through the blue night.
As with any of the other dreams I've had, I have absolutely no clue as to what, if anything, they may mean. But I keep looking up at the sky...