This mound, on which Samudra Koop & Ulta Qila can be found, is often called ‘Kot’. A major walled effectively is found to the mound. It can be thought that this ‘Samudra Koop’ would be the one particular, that's aptly described in Matsya Puran & Padm Puran though archaeologists https://antoniol888nfv9.bloggactif.com/21332827/the-2-minute-rule-for-prayagraj