Bertram's Old Mine was one of the mines on the Mid Sodor Railway, which was owned by Sodor Gold Company at the time until the company and mine closed down. Bertram and the Mine Engine used to work here.
At some point, Bertram was abandoned here and nature overgrew the mine and all the leftover scrap. Many years later, Toby discovered the mine when he took Sir Topham Hatt and his grandchildren exploring. Whilst on guard one night, Toby found Bertram, now they, Skarloey and Rheneas take visitors to and from the attractions that have been built on the site. There is also a small station at the mine.
- The station building looks very similar to the Lower Tidmouth and Norramby Church Station buildings.
- On the 2014 television series map, the mine is said to be located near Ffarquhar Road and Tidmouth Bay, however there are no Skarloey Railway narrow gauge tracks leading here.