Be ready to brave mammoth crowds (more than 40 crore people will be attending the festivities over the next few weeks) and the cold (temperatures dip till 7 degrees), but if you overcome that, the Maha Kumbh is a once-in-a-lifetime opportunity.

The Culture Ministry revealed that underwater drones, capable of diving up to 100 meters, are stationed at the Sangam area for Maha kumbh.

The Maha Kumbh Mela, or the Great Pitcher Festival, will bring more than 400 million people to Prayagraj city in northern India over a period of six weeks starting Monday, making it the largest gathering of humanity in the world.

Over the coming 45 days, an estimated 400 million Hindus are expected to come together for Maha Kumbh Mela. The festival is held every 12 years but the "Maha" or grand Kumbh Mela takes place only every 144 years, "marking the 12th Kumbh Mela and a special celestial alignment of the sun, moon and Jupiter", said The Guardian.

While the Kumbh Mela festival is ordinarly held every three years, rotating between several holy cities on the banks of these rivers, the Maha Kumbh Mela occurs only once every 12 years. Maha means “great”, and the event attracts the most devotees because it is considered the most auspicious and holy in the cycle.

Maha Kumbh Mela or Great Pitcher Festival begins in India on Monday, a Hindu sacred event that will be the world's largest gathering of humanity as it showcases religion, spirituality, tourism and crowd management.

India's Maha Kumbh Mela, or Great Pitcher Festival, is set to be the world's largest gathering of humanity, with 400 million visitors expected at the six-week event that began this week in the northern city of Prayagraj.

As the world's largest spiritual gathering, Maha Kumbh Mela begins on Monday (Jan 13) in India's Prayagraj, over 15 million devotees took a holy dip on the first day to mark its beginning. The Kumbh Mela takes place every 12 years in India,