|Location||About 14 km from Allahabad railway station in old Jhunsi, Allahabad, U.P., India|
|Timings||24 hours, opens on all days|
|Ideal time||Throughout the year|
|How to reach||Hire an auto rickshaw from any part of the city|
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. Till 1855, this area was in the form of a mound only but in the same year a Vaishnav saint Sudarshan Das from Ayodhya renovated the well and got an ashram & a temple built here. This area has big stairs on the Ganges side along with many caves. Five similar wells are found in Ujjain, Mathura, Allahabad, Varanasi & Patalpur also.
Harbenga, the local ruler was very cruel. He hatched the conspiracy of maligning the Sheikh Taqui Baba- a local saint. As a consequence of curses of baba, his evil designs boom ranged and his fort got topsiturveyed (Ulta Qila) and his set up was totally destroyed in a big fire, so the place came to be known as Jhulsi or Jhunsi. But according to some documents released by the Archaeological Department, this incidence happened due to the curses of Guru Gorakhnath, the disciple of Matseyndra Nath.