Metro de Bilbao is the rapid transit network serving Bilbao and the wider Biscay area in Spain's Basque Country, with its first line opening in 1995. Its distinctive stations, designed with glass entrances known locally as fosteritos, have made the system a recognisable part of the city's identity. Short recordings from stations and trains circulate online as location-specific sound effects, used by editors who want an authentic Spanish metro atmosphere instead of a generic subway clip for travel, transport and city content.