Sharmishtha Talav is the best example of water harvesting system built during rule of Solanki period and till date in use. This ancient lake was filled up by the waters of the river Kapila flowing from the hills of Aravalli. The huge lake is well surrounded and development work took place in and around the lake many times which includes well paved roads, gardens and provisioning of boating. It is believed that the Hatkeshwar temple and Sharmishtha Lake, now in the outskirts of Vadnagar, once stood in the middle of the city, from which we could realize the prosperous and richness of Vadnagar