Bilbao, with a population of about 350,000 (2018, and over a million in the metro area), is the largest city in Spain's Basque Country. 

Bilbao is perhaps the best place in the world to experience the ancient culture and language of the Basque people, which has stubbornly held its own over thousands of years and is now completely unlike any modern-day culture in Europe.

Milder and rainier than most other parts of Spain (temperatures here rarely fall below freezing in winter nor rise much above 25°C even in the height of summer), the greenery of this city on the banks of the Nervión is both a blessing and a curse: the climate here is as much a welcome relief from the heat of the dry plains in the south as a thorn in the side of those hoping for a day at the beach.

- Wikivoyage