The North Bay Railway has what is believed to be the oldest operational diesel - hydraulic locomotive in the world .
The North Bay Railway is a miniature railway running from the park through Northstead Manor Gardens to the Sea Life Centre at Scalby Mills .
The railway     has what is believed to be the oldest operational diesel - hydraulic locomotive in the world .
The North Bay Railway is a miniature railway running from the park through Northstead Manor Gardens to the Sea Life Centre at Scalby Mills .