La etimología de Busturia Curiosity · Busturia, Gernika-Bermeo, Bizkaia Image of Busturia, not of the place itself. According to the theory of the linguist Koldo Mitxelena, the name "Busturia" comes from "bost uri" (five towns), referring to the five districts that historically made up the municipality. Photo: Telle (CC BY-SA 3.0) What to see and do in Busturia