A really interesting tour of the countryside that ended up at a local wine cellar (not a vineyard, the vines and grapes are a few miles away) with a wine tasting and opportunity to buy wine direct from the producers. Our tour guide was very friendly, knowledgeable and spoke good English. We stopped for both coffee and lunch at excellent locations that our guide recommended. If you are staying in Bilbao then this is a trip worth making.
A shorter trip out of Bilbao to stop and see some sights by the coast. You don't get to go on the transporter bridge, but you do get to see it in operation. Our guide was a knowledgeable and friendly guide and spoke good English.