The Waikato River is full of old rusting cars and motorbikes Commercial dive company Deep Dive have pulled out 33 in the last three years. And they only do it in their spare time! Today they are cleaning up a site in near Graham Island in Hamilton east. A dumping ground so popular they've already discovered three cars stacked on top of each other... All under the water. According to diver and managing director Tua Karalus this is the most challenging site yet.