If you do one thing on a road trip, you should visit a factory, and the coolest factories in America make cars. On my recent road trip vacation from Detroit to Savannah, GA and back, we stopped in Georgetown, KY to visit the Toyota Motor Manufacturing Kentucky plant (TMMK). TMMK is home to the largest Toyota plant in North America and produces the Camry, the Camry Solara, the Camry Solara Convertible, and the Avalon. It's a fully integrated plant, meaning they not only assemble the cars there, but also make stampings and engines and plastics, too. The free tour included a short video presentation on working at the plant and a nearly hour-long tram ride right on the assembly lines. You're within 20 feet of the conveyor for most of the ride--about as good of a view as you can get at any plant in the US. The visitors center includes several car cutaways, a Toyota merchandise shop, and displays on the history of Toyota. They don't allow cameras past the front door, so this is the only shot I have! Have you been to an assembly plant? Tell us about it!