This image from iStockPhoto is great to illustratie "make-overs". Add minimalist text either in the white or the yellow (depending on whether you want to highlight the old or the new).
Skilled Photoshoppers can change the color into something different than yellow.
To create more yellow space. Make a copy of the image. Crop only the yellow wall, align it to the right of the main image and stretch until the right margin. Again, in PhotoShop this can be done more professionally.
Disclosure: no commercial interest

If you liked this post, why not subscribe to daily updates about presentation design via email? Just blog posts, no spam, or you can follow Jan on Twitter to never miss a thing.