The Yorkshire Dales are a region of limestone hills and mountains. The valleys are dramatically glaciated and eroded by water. The whole area is riddled with caves. The highest point is Whernside at 736m.
The area was heavily populated in the Iron Age. There are many settlements in the valleys. The people held out against Romans for a time, building ramparts across strategic passes and holding onto high hillforts. It seems the Romans were content to let things sort themselves out as they built few roads or permanent forts in the hills. This laissez-faire policy obviously worked as the area became full of peaceful Romano-British farmsteads and deities became Romanised.
Later the hills became a stronghold of the Norse against the Normans. Longhouses can be found tucked amongst the limestone pavements.