Picture by an unknown photographer sometime in the 1910s, in the coast of Galicia (Spain). In this area, the Can do Urco is an ominous sign.
If you see the enormous red-eyed hound dragging its chains out of the sea, or hear it howling over the roaring water, your death is near.
Pictures: NPS Archive, Wikimedia, Pixabay.
To see another illustration of Spanish folklore, click here to see my piece for la Güestia.
You can read some more about el Can do Urco (in English) here.