In addition to all the tiling, I’m going to take out the cabinet and sink from the guest bathroom. I have a pedestal sink on my parents land that will look great in there, and I can paint the wall behind the sink to look like a Mondrian/Wright painting (see http://www.craftster.org/forum/index.php?topic=24558.0 for inspiration)
Once that is done, and the sink is in place, I can just take the existing mirror and cut it to be an extreme rectangle (I’m thinking 1 1/2 ft wide, 4 ft tall) and frame it and mount it on the wall so it looks like it’s part of the painting.
Toss in a shower curtain with rectangular geometric designs, etc… The room will look fab.

