The Ganga's unique and numerous virtues appear to be based on myths, but the reasons for its importance are traceable to scientific premises. The Ganga, symbolizing Indian culture and civilization, is regarded by the Hindus as the holiest amongst the rivers, and it is the Indo-Gangetic plain's most significant river owing to its mighty basin and course, and extraordinarily high self-purifying powers. The Ganga originates from Gangori in the Uttrakhand Himalayan glacier as an upland stream, emerges as a river of the plains at Rishikesh, and, after traversing almost the entirety of India from West to East, finally merges into the Bay of Bengal.