Arrr! That be the Dupath Holy Well! A beauty of a wellhouse, that one!
http://www.bath.ac.uk/~prsrlp/kernunos/england/dupath.htm
Cured my whooping cough good and proper. ;o)
Actually - the water didn't look too clean when we were there, and as it's down a slope from a load of cows, I would be wary of ever tasting it! The very thought of drinking from it would be enough to cure most diseases, I reckon..!
I know bugger all about the henge though - will look it up next tiem we're down that way...
Nice to see ya here, mate! You didn't hang about, did you?
G x