Betancuria, Fuerteventura, Spain
Betancuria used to be the captial city of the Canary Island Fuerteventura. It is protected by 700 meter high mountains which kept it safe from attacks until 1593, when it was almost completely destroyed by pirates. The capital then moved to Puerto del Rosario.
The main sight in Betancuria is the parish church Iglesia Nuestra Senora de la Concepcion. The architecture of the church indicates that it not only served religious aspects but also as a place of protection against attacks.
I sent this card myself from our cruise.