Middlesbrough have revealed on their official website that they will spend the rest of the week in Marbella as they look to take advantage of a rare weekend without a competitive fixture.
Boro remain in second spot in the standings, but five games without a win has left the club just one point ahead of third-place Brighton & Hove Albion.
Dubai is known to be a possible destination for Premier League teams who did not progress through to the last 16 of the FA Cup, but Karanka has chosen to take his squad to his native Spain for a period of warm-weather training.
The club will remain at the coastal resort until Sunday before flying back to Teeside in preparation for the home fixture against Cardiff City, which takes place on Tuesday night.
Middlesbrough will be hoping that a win is enough to replace Hull City at the top of the table, with the Tigers currently holding a two-point advantage.