Out in nature, cockroaches are found hiding out in flower beds, underneath mulch, inside sewer systems, under rocks, behind tree bark, inside wood piles, and in potted plants. Cockroaches that have found their way inside homes and businesses are found living in secluded areas that are close to food and water sources. Bathrooms, kitchens, basements, laundry rooms, inside cabinets and drawers, and areas behind large appliances are all potential nesting spots for cockroaches.