Riyadh: The pools of Darb Zubaydah represent a unique model of humanitarian and engineering achievement in Islamic history, transforming the ancient Hajj route stretching from Iraq to Makkah from a perilous passage where pilgrims and caravans faced the threat of thirst into a safe trail, through an intricate water network designed to collect and store rainwater and floodwater along the route.

According to Saudi Press Agency, these pools varied in shape from circular to rectangular and were equipped with filters to settle sediment and dams to collect floodwater. These pools and reservoirs provided vital rest stations for pilgrims, and their features have remained visible through the ages, retaining their unique architectural character that reflects the development of water engineering in Islamic civilization.