Jhusi, Allahabad, Uttar Pradesh, India.
About of 'Samudra Koop' Temple :
It is situated on a big, high mound on bank of the Ganga. It is about 15 feet in diameter and is built of big stones. The entire premises are surrounded by a stone wall. It is said that it was built by the king Samudragupta hence the name. It is also said that the water level below the well is equal to the sea level, hence the name.