In Hindu tradition Triveni Sangam is the "confluence" of three rivers. Sangama is the Sanskrit word for confluence. The point of confluence is a sacred place for Hindus. A bath here is said to flush away all of one's sins and free one from the cycle of rebirth.
Triveni Sangam at Allahabad
One such Triveni Sangam, in Prayag (Allahabad) has two physical rivers Ganges, Yamuna, and the invisible or mythical Saraswati River. The site is in Prayag, India. A place of religious importance and the site for historic Kumbh Mela held every 12 years, over the years it has also been the site of immersion of ashes of several national leaders, including Mahatma Gandhi in 1948.
The three rivers maintain their identity and are visibly different as they merge. While the Yamuna is deep but calm and greenish in colour, the Ganga is shallow, but forceful and clear. The Saraswati remains hidden, but the faithful believe that she makes her presence felt underwater. During the monsoon, when the rivers are in full flow, the confluence of the rivers is seen clearly due to the force of the water, but the same force makes having a dip at the confluence difficult. While the Ganges is only 4 feet deep, the Yamuna is 40 feet deep near the point of their nexus. The river Yamuna merges into the Ganges at this point and the Ganges continues on until it meets the sea at the Bay of Bengal. At the confluence of these two great Indian rivers, where the invisible Saraswati conjoins them, many tirtha yatris take boats to bathe from platforms erected in the Sangam. This, together with the migratory birds give a picturesque look to the river during the Kumbha Mela, in the month of January. It is believed that all the gods come in human form to take a dip at the sangam and expiate their sins.
The Triveni Sangam is believed to be the same place where drops of Nectar fell from the pitcher, from the hands of the Gods. So it is believed that a bath in the Sangam will wash away all one's sins and will clear the way to heaven. Devout Hindus from all over India come to this sacred pilgrimage point to offer prayers and take a dip in the holy waters. The sacred Kumbh Mela is held every 12 years on the banks of Ganga, Yamuna and Sarsvati at Sangam. According to Hindu tradition, the Prakrista Yajna was performed here by Lord Brahma. That is why Allahabad was known as Prayag in ancient times. Allahabad (Prayag) is also called Tirtha-Raja (Prayag Raj), king of all holy places. It is said that Lord Rama visited Prayag Raj/Allahabad when he was in exile.