This mound, on which Samudra Koop & Ulta Qila are located, is also known as ‘Kot’. A big walled well is located on the mound. It is believed that this ‘Samudra Koop’ is the one, which is aptly described in Matsya Puran & Padm Puran while archaeologists believe that it was built during the reign of Samudra Gupta hence this name.