Adoni's apartment is convenient to the river and old town (both 10' walk) and a lovely 20-25' walk to the Gehry museum. If you drive, there is convenient underground parking about 10' away but dropping your bags directly at the apartment takes some creative parking on the sidewalk. Our best experience in Bilbao was a "Greeter tour" which took us to places we would not have visited and gave us a most interesting perspective. Taking a side trip to Bermeo and San Juan de Gaztelugatxe on a nice day is definitely worthwhile.