Yes, there are too many things to do and see across these regions. Each one of them would warrant an entire stay of 10 days. But as always, you will have to make some choices if you want to see some of the highlights. Here is what we did as a family of 3, with a kid that just turned 11. High-Level Itinerary We started and ended at Bilbao Airport, but we skipped the city itself, despite it's wonderful Gugenheim museum. We decided to see the local coast line, enjoy local food and see a few other towns and cities. So here are those: Day 1 (afternoon) - Arrival Bilbao Airport Picking up the car and driving details => read before you start... Drive to Pechon - 1 1/2 hours "Check into" our HomeAway apartment Get groceries at Lupa Walk to the beach Cook a simple meal and chill Day 2 - Lastres and Llanes ( details about days 2 - 4 can be found here ) Roadtrip to see Lastres Lunch at La Rula in the harbor (menu del did for Euro 12 p/p) Lastres t...

Renting (or even better, borrowing) a car is the way to go if you want to go across northern Spain. The below are some (semi-)useful and random things to know about driving around in Spain. The below is our actual experience in June/July 2018, and we flew into Bilbao and ended our 10 day trip in San Sebastian. Where to rent and drop off? Well, most airports will have rental counters, and you'll find the usual suspects. So not much to add here to what most guide books will tell you. We rented a car at the airport Bilbao, via Hertz, but that last bit is mostly because we found a deal connected to our flight via Expedia. Everything was pretty smooth, but we did drive around the parking garage, and could not get out... luckily no one was behind us, so we backed up and drove around again. Turns out that - we found out after driving back to the Hertz attendants and actually asking - the gates are license plate activated and should (!!) open without tickets. They should just op...