This is based on another dream that I had.
In this dream, I pictured this as a place where "all things go." To this day, I'm still not quite sure what that means, but all I know is in my dream and at that precise moment I stood there in this alien landscape, it made perfect sense
I envision the glowing gates as doorways to other worlds, with airships and zeppelins to ferry travelers from distant places. The gates can expand or shrink as necessary to allow visitors of all shapes and sizes into this place.
Haven't dreamed about this place since, but I would like to go back!