facebook thumbnail image

Hi There, I'm having problems with my facebook thumbnail featured image. Every time I share my main URL page (www.florestaventura.com) the featured image is one of the many images of the page. I would like it to be my logo. I've tried to change it with Yoast (Social >Facebook ), activating the Open Graph and adding a specific image, but it's still not working. What can i do now? Regards,