Kumbh Mela "Festival of the Sacred Pitcher" is an important Hindu pilgrimage, celebrated approximately every 6, 12 and 144 years, correlated with the partial or full revolution of Jupiter and representing the largest human gathering in the world. In 2007, National Geographic filmed and broadcast a documentary of the Prayag Kumbh Mela, named Inside Nirvana, under the direction of Karina Holden with the scholar Kama Maclean as a consultant.