Bilbao or San Sebastián: choosing a base in the Basque Country

The short answer

Choose by what you want to have on your doorstep, because the two cities hold different things. Bilbao is the base for the Guggenheim, the Old Town's Seven Streets and the estuary, La Ría. The Bizkaia Bridge and San Juan de Gaztelugatxe, which the Basque Country's official tourism site also names on its Bilbao page, lie outside the city, according to the bridge's operator and the tourism site's own page for Gaztelugatxe.[4][7][1] San Sebastián is the base for La Concha bay and its beaches, the Old Part and its pintxo bars, and the film festival each September.[2]

XTOUR does not publish travel times between Bilbao and San Sebastián, or from either city to the places around it. It has no routing data, and a straight line between two points on a map is not a journey.

What is in Bilbao

The Basque tourism board's Bilbao page builds the city around its transformation, with the Guggenheim Museum Bilbao, designed by Frank Gehry, as its icon, and the riverside Paseo de Abandoibarra beside it.[1] The museum is at Avenida Abandoibarra 2.[5] Its collection, the tourism board says, centres on art of the second half of the twentieth century, with works lent by the Solomon R. Guggenheim Foundation, and its permanent pieces include Richard Serra's The Matter of Time, Jeff Koons' Puppy and Louise Bourgeois' Maman.[5]

The rest of the city's offer on the same page includes La Ría and its bridges, the Casco Viejo, the Old Town of the "seven streets", where the bars serve pintxos, and the Artxanda funicular.[1]

Buying Guggenheim tickets. How the museum sells tickets, and its combo ticket with the Bilbao Fine Arts Museum, are covered in the guide to the Guggenheim and the Fine Arts Museum. The Basque tourism board's page for the museum gives opening hours that do not match the museum's own page, in particular on which Mondays it opens.[6][5] XTOUR's reading is that the museum's page is the one to trust.

What Bilbao is a base for, but does not contain

Two places the tourism board ties to Bilbao are outside the city.

The Bizkaia Bridge. The tourism board says that following La Ría from Bilbao brings you to the Puente Bizkaia, which it calls a jewel of industrial architecture and a World Heritage Site.[1] Its operator, El Transbordador de Vizcaya, gives its address in Las Arenas, Getxo, and places the bridge at the mouth of the Ibaizabal, where Bilbao's navigable estuary met the sea.[7] Its World Heritage page says UNESCO's World Heritage Committee declared it World Heritage on 13 July 2006, that it was assembled in 1893 as the first suspension transporter bridge built in the world, and that the declaration is recorded in the property register of Portugalete.[8] When XTOUR read the operator's site, a notice said the lift was running reduced hours, with capacity limited to half, after a technical incident.[7]

San Juan de Gaztelugatxe. The tourism board describes it as a protected biotope between the coastal towns of Bakio and Bermeo, joined to the shore by a stone bridge and a 241-step staircase, with a hermitage first built, it is believed, in the 9th century. The same page says a free access ticket is needed to visit, lists a bus line from Bilbao's Termibus station that stops there, and advises sensible clothes and shoes.[4]

The booking site it links to, Gaztelugatxe Tiketa, is more precise, and does not quite agree. Its booking rules make a reservation obligatory on the dates marked in its calendar, to guarantee entry against possible limits on access, and say that anyone who fails to turn up for a booking cannot book again for a year.[10] On 9 October 2026 its home page said that no booking ticket was needed to visit that day.[9] XTOUR's reading is that the requirement depends on the date, and that the booking calendar, not the tourism page, is the one to check.

The tourism board's Bilbao page lists both under "nearby essentials", but the same list also holds the Guggenheim and the Old Town, alongside Getxo, Urdaibai, Balmaseda and Plentzia.[1] Because the list mixes places in the city with places outside it, XTOUR takes each place's location from the pages cited above, not from the list.

What is in San Sebastián

The Basque tourism board writes the city as Donostia/San Sebastián, giving both forms of its name. Its page starts with the bay: La Concha beach, framed by Mount Igueldo and Santa Clara island, and two other urban beaches, Zurriola, used by surfers, and Ondarreta, at the end of which stands the Peine del Viento sculpture by Eduardo Chillida and Peña Ganchegui.[2]

The Old Part sits at the foot of Mount Urgull, between the harbour and the estuary of the Urumea, and was rebuilt after a fire in 1813. It holds the basilica of Santa María del Coro, the church of San Vicente, the San Telmo Museum in a former convent and the Plaza de la Constitución, once a bullring.[3] The tourism board names the Old Town's bars as the place for pintxos.[2]

The city's calendar matters too. The tourism board says that every September San Sebastián hosts its International Film Festival, and that it was a European Capital of Culture in 2016. The same page's "nearby essentials" list puts places in the city, such as the Paseo de La Concha and the Old Town, next to Hondarribia, Pasaia, the Aiako Harria Natural Park and the Basque Coast Geopark.[2] XTOUR has not read a page that locates those four, so it does not say how they relate to the city.

How the two compare

XTOUR's reading of these pages is that the choice turns on the list you start from. If the Guggenheim, the Bizkaia Bridge and Gaztelugatxe are the core of it, Bilbao is the city whose tourism page names all three. If the bay, the beaches and the Old Part are the core, San Sebastián is. XTOUR does not rank the two and has no data on hotel prices, crowds or weather in either.

What XTOUR does not tell you

The descriptions above come from the Basque Country's official tourism site and the operators' own pages. XTOUR does not publish prices, opening hours, travel times or ticket-release times for any place on this page. For each city as a base, see the Bilbao and San Sebastián destination pages and the Spain travel guide.