The image of three hares sharing three ears can be found all the way from here to China, where the earliest examples are found. But Devon, and especially Dartmoor, is particularly rich in them.
I've been visiting the churches where the hares can be found; the search has taken me to some beautiful places. Deborah Harvey has written a poem about them, which you can read here. Some of her poem features on the map...
Here are places where you can find the hares in the churches, but do take a torch!
Newton St Cyres
Here is photographer Chris Chapman's Three Hares Project, with lots of excellent pictures.