Freerange Stock is a big website where you can download non-copyrighted photos, pictures and victors. You need to make an account and you can download the content on the website. Look good at the pictures, on some pictures you will go to a different website and then you need to pay. When you have an account you select a photo and click on the download button. Your download will start and you can use it for everything (CC0).
*Scroll down for demos
How to download
Go to https://freerangestock.com and make an account.
Select a photo and click on the green download button.
Your download will start.