Bilbao
Known as an industrial town, Bilbao is the largest port in Spain, as well as a major rail hub, serving as a departure point for most of Basque's country attractions. To international tourists, Bilbao is a place with great food and also home to the controversial $100 million Guggenheim Museum, which was designed by the famed American architect Frank Gehry. You should not allocate more than 2 days for visiting this city, as most of the sights can be viewed in less than 48 hours.
Visit Begonako Basilika, Plaza Nueva, Bilbao Cathedral, Azkuna Zentroa, Zubizuri, Doña Casilda Iturrizar Park, the Guggenheim Museum, and more.