Tughlaqabad Fort, located in Delhi, India, is a prime example of medieval fort architecture and urban planning, constructed by Ghiyas-ud-din Tughlaq, the founder of Tughlaq dynasty, in 1321. Its sophisticated water supply system is one of the most remarkable features about this ancient structure. Built atop a rocky hill with high battlements and sheer drops, it was once a symbol of the might of the Tughlaq empire. The fort had a well-planned water supply system. Rainwater harvesting was employed through a network of tanks, wells, and reservoirs. The complex system was designed to collect and channel the monsoon rains into reservoirs, ensuring a constant supply of water throughout the year. Ingenious engineering solutions such as the step wells (baolis) maximized the water storage for usage during dry spells, which was crucial for the survival of the fort’s inhabitants and for maintaining the lushness of the fortified city's gardens. However, due to neglect over the centuries, what remains of it today stands as a haunting reminder of a glorious past.