As stated on their website, all images are released under Creative Commons CCO into the public domain and can be used royalty-free, including for commercial purposes. Attribution is not required.

You can now add some locally flavored zip to your virtual meeting with a background of the Sunshine Skyway bridge or a gorgeous image of the Pinellas beaches and beautiful picture of the new Pier ...

Canva mostly offers images for a fee, but you’ll also find several background images for free or as part of a free trial. Just click on an image that interests you to preview it. You can then ...