Check it out: Ultreya Abyss!
Someone namned that "cave" Ultreya Abyss! Pretty cool.
I'd love to get a good look at it and Home Plate but somehow I think Spirit will die on Husband Hill. IF we get to the top of Husband Hill we're sure to spend months up there. Spirit's panels are looking mighty dusty in some recent images. The back way down to the SE looks pretty steep even at it's best point.