In this episode, Freyja travels to the Durdle Door in Dorset to find out how the sea creates bays and headlands. We look at how erosion creates caves, arches and stacks.

We also learn about how geology creates different coloured sand, the various types of beaches from sand to shingle, and look at the White Cliffs of Dover. Finally, we look at the reasons people choose to live near the Coast, the importance of Ports and technologies like seawalls and breakwaters.