to the west of abronhill and separating it from kildrum is a deep geographical divide called the vault glen. through the vault glen runs a river, a pipeline which carries sewage and the railway line. the river, initially called the glencryan burn, starts from fannyside lochs and runs through glencryan reservoir and down to forest road, the main road to abronhill. the river then runs under the road and its name changes to the red burn on the other side, behind cumbernauld academy. (on older maps the river was sometimes still called glencryan burn for part of its way through the vault glen). there are four footbridges connecting abronhill with the rest of the town: one on either side of cumbernauld academy, one close to abronhill primary school and one at broom road. this red burn is the one from which cumbernauld's gaelic name is derived. there is a gruesome story about how the red burn (or redburn) itself was named. it involves the killing of roman soldiers whose bodies were dumped in the river at castlecary making it run red.