This mound, on which Samudra Koop & Ulta Qila can be found, is also known as ‘Kot’. A giant walled perfectly is located around the mound. It is actually thought that this ‘Samudra Koop’ could be the a single, that's aptly explained in Matsya Puran & Padm Puran while https://elliotsrogz.ltfblog.com/18881602/the-single-best-strategy-to-use-for-new-yamuna-naini-bridge