A friend sent me this link a while back and it’s been my lock screen since. I’m sure it’ll make a nice lock screen on Windows 8 and newer:
The image is by Abdellah Bouthar from www.windowsblue.com. I haven’t been able to find the original post where it was posted. So to be safe, I haven’t linked the image. It isn’t too find to hard via Bing Images, and it’s plenty big enough more most screens.