Thai 'Indiana Jones' divers scour murky river for treasure Meet the small community known as Thailand's "Indiana Jones" divers, who brave Bangkok's Chaophraya river for sunken treasure. Bhoomin Samang uses a makeshift helmet which is hooked up to a rubber tube connected to an air tank. The tank pumps oxygen into the helmet to keep water out, allowing the most experienced divers to drop down to 30 metres below the surface.