In the Great Motorboat Tour: Biscay, John and Fionn cross the notorious bay in a Sealine S34
Biscay: From Santander to Zumaia
https://www.youtube.com/watch?v=I9i4a17o77A
John and Fionn leave Santander in their wake and motor east to Zumaia, ready to begin their island-hopping adventure in the Bay of Biscay.