As promised a few weeks ago, I've uploaded half a dozen (and counting) wallpapers--desktop, laptop, and mobile--for free personal use. Right here. I've sized them so as to fit most common screen resolutions.
I hope you enjoy this mix of nature and culture.
Report issues to me (please), and suggestions are always welcome. Unless they're not nice. In that case, I'll stare, raise an eyebrow, and then remind you that I'm Russian!