Coastal Cliffs

The Coastal Cliffs are a form of steep cliffs off the coast of Sodor. They were introduced in the ninth season and were absent until the fifteenth season. They seem to be somewhere on Arthur's Branch Line.

Once, Thomas had to deliver beach supplies to Seaside Halt, and Diesel warned him about about the "the curse of the cliffs" which meant that he might get lost and never be seen again. However, Thomas plucked up courage and discovered that nothing bad happened, and Diesel was only trying to scare him.