Take the A8 road from Santurtzi, following the signs for the airport. Drive on towards Mungia, and in around 35 minutes you will reach Bakio, where the promenade along the beach is well worth visiting.
From its western end you can see the promontory of San Juan de Gaztelugatxe stretching out into the sea.
Carry on along the local road that zigzags along the coast. The Romanesque chapel of San Pelayo before you get to San Juan is of interest.
To visit San Juan you will need to book ahead, especially in summer.
However there are several lookout points beside the road from which you can admire this spectacular promontory and the rugged Basque coastline.
Further on, we recommend that you stop at Cabo Matxitxako, one of the best points for watching marine birds. With luck you may even see a whale blowing in the distance.
The next stop is Bermeo, where the old town and fishing port, with their busy atmosphere, are worth visiting, as is the lookout point over the coast.
Some of the canneries in the town offer tours of their plants.
From Bermeo, drive on into the Urdaibai Biosphere Reserve. This is one of the finest natural landscapes anywhere on the coast, or indeed in the Basque Country as a whole.
In Mundaka the old town and the tiny port are worth seeing. By the port there are several viewing balconies over the coast where you can see the town’s world-famous surfing wave. Uniquely, this wave breaks to the left, making it a magnet for surfers, who flock here from all over the world.
Now drive on through the reserve towards Gernika, stopping to visit Ekoetxea, the Basque Biodiversity Centre, which is based in the Madariaga tower.
This centre is located on a hilltop, which makes it an ideal spot to enjoy the changes brought about in the landscape by the tides.
In Gernika, we recommend visiting the Assembly House, beside which stands the iconic oak that symbolises the traditional freedoms of Bizkaia and the rest of the Basque Country.
Also in Gernika, you may like to visit the Museum of the Basque Country and the Peoples of Europe Park, which is home to sculptures by Henry Moore and Eduardo Chillida.
There is also the Peace Museum, dedicated to peace and human rights.
If you visit the town on a Monday, take a walk through the market square, where local farmers gather every week to sell seasonal produce from their fields.