It is called in Hindi 'Mont ka kua". It means well of death. The Wall of Death, motordrome, silodrome or Well of Death is a carnival sideshow featuring a silo- or barrel-shaped wooden cylinder, typically ranging from 20 to 36 feet (6.1 to 11.0 m) in diameter and made of wooden planks, inside which motorcyclists, or the drivers of miniature automobiles, travel along the vertical wall and perform stunts, held in place by friction[4] and centrifugal force.