There was no problem to see fish in the clear water, they were everywhere.
Unfortunately almost all the leaves from the trees have fallen down, which felt odd as elsewere there are plenty of fall colors. Might depend on the trees?
Best known is Monsal Dale for the bridge crossing the river wye, and it looked pretty impressive, I must say.
The route took 3.5 hours and it was very easy to walk. The walk ended at the pub the Bull's head in the village Ashford-in-the-water.