Secret Room with Treasure

My brother told me that he had found a secret passage in my house and he showed me what he had found. He lifted up a square piece of carpeting with an even smaller square cut in the wood floor below. He used this to open the passage. He , my wife and I all went down and the space seemed small at first but eventually opened up into an entire room which caused my mind to briefly ponder dimensions of it all.To the left there were several binders full of pictures, towards the front of the house there were several ornamental owls of various sizes ranging from small to quite large.  I had not yet begun to explore the treasure when I woke up. Again, this is yet another dream about finding a secret passage or secret room that led to long lost or undiscovered treasures of some kind.