Have you ever heard of a bog on a roof? There is one at the Minneapolis College of Art and Design. Artist Christine Baeumler wanted to showcase the bog ecosystem in her project "Reconstructing the Landscape: A Tamarack Rooftop Restoration." In addition to tamarack trees, there are 30+ native bog species and a pool of open water . . . on top of a roof!
Check it out one of these days.
Read about the project here and here.