The Craftsmanship Museum is located in Carlsbad not far from the intersection of Palomar Airport Road and Melrose and boasts an outstanding collection of miniatures and models including automobiles, boats, airplanes, engines, etc.  And they actually operate!  The museum displays the finest automotive miniature ever made, a 1/6 scale model 1932 Duesenberg SJ which took 10 years and 20,000 hours to complete and contains over 6,000 custom made parts.  And the museum is free!

Links:    museum website