Allahabad: Allahabad lies 135 km west of Varanasi in the north Indian state of Uttar Pradesh 
and is at the confluence of the Ganga (also Ganges), Yamuna, and the mythical Saraswati River, the point of their mingling known as Sangam. 
Also known by its old name of Prayag, the city is an educational hub and a great pilgrimage center, especially the world-famous Kumbh Mela.       

History
Allahabad finds mention in the holy scriptures-the Vedas and the grand epics, the Ramayana and the Mahabharata, and in the Puranas-as Prayag. Hindu mythology has it that Lord Brahma, the creator, chose a piece land on earth, on which the Ganga,Yamuna, and Saraswati would flow into a quiet confluence. He referred to it as 'Tirtharaj' or the 'king of all pilgrimage centers.' 

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The Kumbh Mela is the greatest of north Indian festival-fairs and it has exerted a mesmeric influence over the mind and the imagination of the ordinary Indian from time immemorial. It is held once every three years by rotation, on the banks of holy rivers-the Godavari in Nasik, the Shipra in Ujjain, the Ganga in Haridwar and the Sangam in Allahabad. The Purna (complete) Kumbh, the biggest and the most auspicious fair, which falls once every twelve years, is always at Allahabad. When the particular configuration of the Kumbh at Allahabad falls on a Monday, it is called the Somvati Amavasya and the spiritual benefits increase manifold. The Purna Kumbh is followed by the Ardh Kumbh in importance and this fair falls every six years when millions of devout congregate at Allahabad on the banks of the holy river, braving the hazards of cold, disease, hunger and a myriad other privations, to gain spiritual salvation and contentment.

Other fairs include the Magh Mela, which is celebrated in the month of February.   Tour Enquiry For Allahabad