Haridwar is an ancient city and important Hindu pilgrimage site in North India's Uttarakhand state, where the River Ganges exits the Himalayan foothills.

The largest of several sacred ghats (bathing steps), Har Ki Pauri hosts a nightly Ganga Aarti (river-worshipping ceremony) in which tiny flickering lamps are floated off the steps. Worshipers fill the city during major festivals including the annual Kanwar Mela.

Kumbh Mela, also called Kumbha Mela, in Hinduism, religious festival that is celebrated four times over the course of 12 years, the site of the observance rotating between four pilgrimage places on four sacred rivers—at Haridwar on the Ganges River, at Ujjain on the Shipra, at Nashik on the Godavari, and at Prayag (modern Prayagraj) at the confluence of the Ganges, the Jamuna, and the mythical Sarasvati.

Each site’s celebration is based on a distinct set of astrological positions of the Sun, the Moon, and Jupiter, the holiest time occurring at the exact moment when these positions are fully occupied.

The Kumbh Mela at Prayag, in particular, attracts millions of pilgrims. In addition, a Great Kumbh Mela festival is held every 144 years at Prayag, most recently in 2001. The Kumbh Mela lasts several weeks and is one of the largest festivals in the world, attracting more than 200 million people in 2019, including 50 million on the festival’s most auspicious day.