Old land drains are underground networks originally installed to control excess moisture in rural areas. Their purpose is to divert surplus water in fields and around buildings. These systems typically used clay tiles rather than the plastic or metal materials seen today. Despite their simplicity, they performed well for decades. https://levelinverts21975.tinyblogging.com/h1-how-old-land-drains-work-and-why-they-still-matter-h1-82366728