Arnold Schwarzenegger -- I'm Huge at Muscle Beach!

Arnold Schwarzenegger loves the artwork in Venice Beach ... of himself.

While riding around his old pumping ground at Muscle Beach Tuesday, the 65-year-old former Mr. Olympia stopped to take a pic in front of a larger-than-life mural of himself posing during his ridiculously huge bodybuilding days.

Ahnold is obviously a big fan of the painting by artist Jonas Never, since he posted the photo on Instagram with the comment, Then and now - great mural here in Venice.

He's quite a piece of work.