"You do ill if you praise, but worse if you censure, what you do not understand."
- Leonardo da Vinci

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.

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