Here, boat tour operators such as Adelaide River Queen Cruises actively try to attract the crocs by dangling meat over the side.

BBC: Driving Australia��s desolate Stuart Highway

The Dartford Tunnel and Queen Elizabeth II bridge cross the River Thames between Dartford and Thurrock.

BBC: MP calls for action on Dartford Crossing traffic jams

The Dartford Tunnel and Queen Elizabeth II bridge cross the River Thames between Dartford and Thurrock, forming a link in the M25 motorway, carrying about 150, 000 vehicles a day.

BBC: Dartford charge suspension considered at busy times