Recently. I made many desktop backgrounds for my computers involving some knowledge discovered in real life.
In order to encourage students to discover academic knowledge learned from the school in real life, I have upload all of the images onto my website.
You can download and use them for free. You just need to right click or hold the images to download. All of the images are high-quality.
Note: All images are copyrighted and for personal use only, but you can also set them as your computer desktop background like me.