+1 on the stanage plan. If you like spoons and traffic lights go to the David Mellor museum down the road ( he designed both and there’s an exhibition and shop and stuff) and after that go to the plough for lunch.
From the plough, have a walk up the river (cross the road from the pub, wander back towards hathersage but take a left over the stile before the bridge over the river) and there’s a 2 mile round walk up the riverbank, over the stepping stones across the river and then back to the village.
Go for a swim in the lido ( heated open air outdoor pool thing. Very 40s style)