there are a number of walks, but start with the river walk, has some steel wire supports around a cliff section which is fun to negotiate and then amongst the shale scree that has fallen, there is a good chance you will find
plant fossils. The gorge is a geologists dream with remnant evidence of ancient glaciers and massive tectonic uplifts. If it is warm you can have a swim in the swimming holes and beaches. see
https://www.youtube.com/watch?v=dYB1MWIvspQ