Whatever you project or website you may be working on, adding a quality pictures can make your content look more professional. Finding photos and images shared under Creative Commons CC0 license, means that you can freely use them without giving credit to the creator. Best of all, it will cost you nothing.
Here’s the list of websites where you can find lots of CC0 photos:-
For further details on what CC0 is all about, you can checkout the Creative Commons website on the CC0 licensing.