Sant Roc Main Festival of Arenys de Mar Activity · Arenys de Mar, Maresme, Barcelona Image of Arenys de Mar, not of the place itself. The Festa de Sant Roc of Arenys de Mar is celebrated on 16 August and commemorates the town's 1607 vow (Vot de Vila), when the townspeople sought the protection of Sant Roc against the plague; it is recognised as a Festa Patrimonial d'Interès Nacional, and its most characteristic event is the procession of "macips i macipes" (young men and women), who bless the townspeople with basil-scented water using traditional "almorratxa" sprinklers. 16 d'agost Photo: Alberto-g-rovi (CC BY 3.0) What to see and do in Arenys de Mar