What is on the other side?

A tiny little bridge beckoned me 
I had to take a look inside
Where did that tunnel lead?
What was on the other side?
We stopped the car; clambered out
Walked up to that tiny little bridge
Walked underneath the railway bridge
That the Cockle train; moves along
Heard birds cheeping: close to the seas
Watched; the wind rustling the trees
A little piece of heaven we discovered
Right in the middle of Middleton...