Lamar Odom -- Touches Down In Spain ... Media Circus Underway!

The Odom has landed.

Lamar Odom's Spanish basketball career is officially underway ... with L.O. arriving in Vitoria-Gastiez, Spain on Wednesday to join his new team -- and the media was ALL OVER THE GUY.

Odom signed a 2-month contract to play for the crappy Laboral Kutxa basketball team -- a team that's last in its division -- and many skeptics say they only signed Odom as a shameless P.R. move.

Just look at the photo ... dude's been swarmed by the media since he stepped off the plane.

Still, Odom sees the whole thing as an opportunity to prove he can still play -- and believes it could lead to a triumphant return to the NBA.

He's expected to hit the hardwood as early as Saturday. Stay tuned ...