We decided that our little farm needed a root cellar to store our produce in. For those unfamiliar with the term, a root cellar is an underground room that acts like a natural refrigerator, maintaining temperatures in the mid 30's F in the winter and mid 50's in the summer. Step one: Dig a hole in the ground. We are fortunate to have a local gravedigger who is a real artist with a backhoe. He can carve a hole with straight sides almost within an inch of what you ask for. Step two, pour a conc