The town motto of Arenas de San Pedro is siempre incendiada, y siempre fiel (“always aflame and always faithful”). The coat of arms is a picture of the castle in flames, surprisingly reminiscent of card sixteen – the Tower – in many tarot decks.
The fireworks at the Arenas fiestas are always set off from inside the castle, which provides a lovely backdrop and such wonderfully appropriate images as this:

(This time the pink hues are not due to problems with my camera.)

