Farmer McColl's Field is located opposite his farm. Once, Thomas ignored a "men-at-work" sign and chuffed too fast on the bumpy tracks that were under repair and the load of books he was carrying bounced off the rails and into the field where they then held a "storytime picnic in the sun".
Sheep and cattle can occasionally be found grazing in the field.
At some times of the year, seeds are planted in the field and a scarecrow is erected to scare away the crows.
In the 2007 magazine story, The Lost Spring, Farmer McColl says there is an underground spring located somewhere beneath his field. Ben later unearths it by accident and it provides enough water for Farmer McColl's crops throughout a bad heatwave.