John deere has some nice tours. The best tours cost half a million or more - but they let you take one home. (If you know a farmer who buys new tractors ask - many farmers have seen it and so won’t use their tour , so you can get their ticket). Then there is the free tours that anyone can take - but these are limited numbers and tour bus companies reserve all the spots when they open up knowing they can then sell the whole tour (if you don’t live near the factory this is the way to go since the factories are generally a boring drive away and the tour drivers know how to spice it up and where to eat). As an employee I’ve only got the engineers tour - that is when everyone staring at you knows it is your fault they are getting paid to do nothing - I do not recommend these even though they were paying me.