The cat tower, upholstered in a lovely velour on which a painting of Elvis could be made.
The jury is still out. I got a tall tower on purpose. My thinking: the taller, the better for keeping out of the dog's reach. The reality: the taller, the more unstable. It will tip over if you look at it wrong. So I bolted it to the wall. The other reality is that Bert is a big cat and he barely fits on the platforms, and I don't think there's any way he could sit on the very top.
But he is using the tower on his own, sort of. I find him perched on the third level many mornings waiting for me to bring his breakfast. The tower, you see (although not from this photo), is right next to the door that goes into the house. So when I open the door, there he is at (almost) eye level. Meow!