You can download this image for free from here.
Over time I have taken loads of photos like the above which is a section of an old boat on land. I have also taken loads of photos of pretty flowers, skies and clouds, and walls a.o. Some of them are uploaded to Pexels.com and maybe you can use them as backgrounds, textures or if you need something for your powerpoint presentation. You are free to use them 🙂