"In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move."
- 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.















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