From here the river follows a gorge so deep that the valley bottom is impassable.

"This must have been the route the river followed originally," Kane said.

Subsequent development led to the continuation of the course which the river follows at the present day.

In its lower parts this river follows almost a straight line.

The river roughly follows the edge of the glaciation during the last ice age.

From here on, the landscape is fairly flat and the river follows the A3 motorway.

The river then follows the east side of Route 287.

The river follows the cut and turns sharply to the right when it rejoins the main course.

Further the river follows a deep gorge called "the cave of the witches".

Down the river would mean with the current, because rivers respond to gravity and always follow the path of least resistance.