You can go and visit other towns. Check out the Saturday market in Zumarraga and get to know both Zumarraga and Urretxu, to follow Ezkio-Itsaso and the Igartubeiti farmhouse. This is the first choice.
Go up to the hermitage La Antigua in Zumarraga, where "the route of the three temples" departs and marvel. Also Arantzazu, in Oñati, and in Azpeitia the Sanctuary of San Ignacio de Loyola, You could visit the railway museum and travel on a steam train. This would be the second alternative.