Barcelona (planet)

Barcelona was a planet mentioned by the Ninth and Tenth Doctors, shortly before and after the Ninth Doctor's regeneration. Supposedly its inhabitants included dogs with no noses. As a result, the joke about dogs with no noses was always funny on this planet according to the Ninth Doctor. (TV: The Parting of the Ways, Children in Need Special)

Having told Rose Tyler that she would've "love[d] it" prior to his regeneration, the newly regenerated Tenth Doctor set a course to Barcelona at 6PM of a Tuesday in October 5006. However, because of Roses’s uncertainty of the Doctor’s new incarnation, he cancelled this trip to take Rose back home to the Powell Estate on Christmas Eve 2006. (TV: Children in Need Special)

After defeating Es'Cartrss of the Tactire, the Tenth Doctor decided he would venture over to planet Barcelona. (COMIC: The Forgotten)

Information from invalid sources
While Christel Dee was describing where she planned to go on a summer holiday, she specified that she was going to Barcelona. She then clarified that she was referring to 'the city Barcelona - Spanish Barcelona - not the planet Barcelona', and that the planet had 'too many no-nosed dogs'. (NOTVALID: Doctor Who Minecraft)