The construction of the lake was done by some of the finest Mughal architects of the time as evident from the different cuttings and designs in the stones that have been employed to construct the polygonal shaped reservoir that resides right in the middle of this lake.Kankaria lake consists of an island that encompasses Nagina Wadi, which is a garden, right in the middle of it. This place in itself is a beautiful tourist spot here. Nagina means jewel here. The garden further consists of a summer palace which goes by the name of Ghattamandal.Merutunga, a chronicler of the 14th century, said that Karna, the ruler of Chalukya origin, after defeating the Bhil chief Asha, ordered for a temple to be built. This temple was dedicated to Kochharba, a goddess, wherein Karnavati city, which is nearby, was also established by him along with many more temples like Jayantidevi and Karnamukteshwara temples.Karna also established a tank in the city of Karnavati, next to the Karneshvara temple and this tank was named as the Karnasagara tank, which is presently known as the Kankaria Lake. However, the validity of the origin of this story is questionable.