Taking a quote from ibid's answer:
A thousand years or more ago,
When I was newly sewn,
There lived four wizards of renown,
Whose names are still well known:
Bold Gryffindor, from wild moor,
Fair Ravenclaw, from glen,
Sweet Hufflepuff, from valley broad,
Shrewd Slytherin, from fen.
-- HP and the Goblet of Fire, Chapter 12
So we can deduce a few things:
Rowena Ravenclaw came from "glen", presumably a reference to the glens of Scotland. (This is backed up by the fact that in The Wizarding World of Harry Potter, Ravenclaw's portrait speaks with a Scottish accent.)
Salazar Slytherin came from "fen", which could well refer to the Fens, a region of eastern England.
Helga Hufflepuff came from a "valley", which is far too generic a description: unknown.