Adjust height of entire .entry-wrap (content) for each page and post

As you can see from my pages and posts the main content goes on top of the footer. What I would like is to adjust the content (.entry-wrap) for all pages and posts so that the page content ends just right above the background image monument/ruins, just where the blue sky is. I hope you understand. and I when I scroll down the contents goes up. Thank you. https://thevegansandwich.com