Tree Stump Removal --- Get rid of tree stumps by drilling holes in the stumps; fill them with Epsom salt; and wait. Live stumps may take as long as a month to decay, but will start to decompose all by themselves.
Old windows being used as a greenhouse where it stays cold late in spring. The same design could be used with a window well to bring natural light to a basement. (it will also add heat to the window area)