I like kuhio's response - our home is also paid for, it's all ours for as long as we want it to be.

Inside this home, I guess I would say my Grandfather's Clock. It really is my Grandfather's clock. It's over 100 years old, and I can remember as a child seeing it standing tall and elegant just to the left of the fireplace in my grandparent's home. Every time I wind it, I think of how many times my grandfather wound it - so many years ago. It keeps perfect time and plays the Westminster tune every 15 minutes.