Allahabad, now known as Prayagraj, is a city located in the northern Indian state of Uttar Pradesh. It is famous for its confluence of rivers and their religious significance in Hinduism. Three major rivers flow through or converge near Allahabad, making it a sacred destination for pilgrims. These rivers are:

1. Ganges (Ganga): The Ganges River is one of the most sacred rivers in Hinduism and flows through the heart of Allahabad. It is believed that taking a dip in the Ganges in Allahabad, especially at the Sangam (the confluence of rivers), cleanses one's sins and leads to spiritual purification. The Ganges is central to various religious rituals and festivals in the city.

2. Yamuna: The Yamuna River, another holy river in Hinduism, meets the Ganges at the Sangam in Allahabad. This confluence is considered extremely auspicious, and it is the site of the Kumbh Mela, a major Hindu festival that attracts millions of pilgrims from around the world every 12 years. The Sangam is where the Yamuna and Ganges merge into one, along with the mythical Saraswati River, making it a significant pilgrimage spot.

3. Saraswati (Mythical): The Saraswati River is mentioned in Hindu scriptures as a mythical river that is believed to flow underground. At the Sangam in Allahabad, it is believed that the Saraswati River also converges with the Ganges and Yamuna, though it is not visible on the surface. Despite its mythological significance, the Saraswati River is not a physical river in the same way as the Ganges and Yamuna.

The confluence of these three rivers at the Sangam is considered one of the holiest sites in Hinduism. Many religious ceremonies, rituals, and festivals take place here, making Allahabad (Prayagraj) a prominent pilgrimage destination for Hindus. It is also an important cultural and historical city in India, known for its rich heritage and role in the country's struggle for independence. The name "Prayagraj" itself reflects the city's status as the "place of sacrifice" in Sanskrit, highlighting its spiritual and cultural significance.