If you are not Sundanese, chances are you won't have any idea what 'kukuyaan' means.
'Kukuyaan' is derived from a Sundanese word 'kuya' which means 'turtle'. Hence, 'kukuyaan' means playing turtle. Of course it's not a real turtle that's being played. It's just the name that the Sundanese gives to playing inner tube in the water.
The mass and national record-breaking 'kukuyaan' in these pictures was held last Sunday (19/6/2011) at Cikapundung river as part of the campaign to clean up the river.
Photos were taken by Sudarmanto Edris, a local photographer, and were used with his permission. Thanks Pak Sudarmanto.