Festivities of invierno de Andorra (San Blas) Activity · Andorra, Andorra-Sierra de Arcos, Teruel Image of Andorra, not of the place itself. In Andorra-Sierra de Arcos it is traditional to light bonfires both for San Antón, on 17 January, and for San Blas, on 3 February; Andorra, capital of the comarca, follows this custom common to its villages. Photo: Zarateman (CC0) What to see and do in Andorra