I hadn't got a great deal planned for today so when mum called & asked if I wanted go caching I jumped at the chance. When we'd finished the series we were doing, we tried to find a letterbox that had been there since before the series was placed. We searched to the west of this old railway tunnel & couldn't find it, then we realised we had to be on another path that ran over the tunnel & perpendicular to the path we were on. A quick scramble up the bank round the back of the tunnel finally lead us to the cache before we had the far harder job of going back down the bank.