"Vertical Landscape" by Eiko Ojala. It looks like a paper landscape but the artist actually works digitally and hand-draws all the elements to look like they're cut out of people. (Hint: the shadows help!
Lesson Inspiration to do a layered painting with maybe a cut-out paper ark to stick on top at this kind of scale, from an illustration from "Noah's Ark" by Miche Wynants for Harcourt, Brace & World. via Vintage Childrens Books My Kid Loves