Bilbao is the most compelling urban regeneration story in Europe — a post-industrial Basque port city that transformed itself in less than two decades from a declining steelworks and shipbuilding economy into one of the continent's most talked-about cultural destinations, largely on the strength of a single building. Frank Gehry's Guggenheim Bilbao, which opened in 1997, is still the most significant piece of architecture built anywhere in the world since the Pompidou Centre: titanium panels that shift colour with the Basque light, a curved form that nobody had ever seen before, and a collection inside that matches the ambition of the shell. The city that grew up around it has delivered: a pintxos culture that rivals San Sebastián, a vibrant Casco Viejo, and the sense of a city genuinely proud of what it has become.
From London it's under two hours — Vueling and easyJet fly direct from Heathrow and Gatwick, with Ryanair serving Bilbao Airport from multiple UK regional airports. The airport is 12km from the centre (BizkaiBus, 30 minutes, €3). Go from April to October for the best combination of weather and outdoor pintxos life. July and August can be crowded with Spanish summer tourists; May and September are the finest months. The Semana Grande festival (August) fills the city with music and fireworks for ten days.