The Sidoarjo regency in East Java, Indonesia is known for its cottage industries which produce traditional prawn and fish flavoured crackers. However, tourists who flock there aren’t just lured by the promise of crunchy titbits, but come to see the largest mud volcano in the world.The Sidoarjo mud flow, commonly called Lusi – an abbreviation of Lumpur Sidoarjo, “lumpur” means “mud” in Indonesian – has been spewing mud since it erupted in May 2006.