"Nothing travels faster than the speed of light with the possible exception of bad news, which obeys its own special laws."
- Douglas Adams
A huge wall that the river has carved out from the soft stone over thousands of years. The river used to erode over a meter every year; however, these days it has been reduced to less than 30cm/year and through continued water control and anti-erosion measures it's expected that it can be reduced to about 10cm/year.
