For those of you into that kinda stuff, here's an event worth checking out.
https://en.wikipedia.org/wiki/Old_Thresher%27s_Reunion
This is an annual "gathering" of old-timey farming stuff, including a couple dozen (or more, depending) of the huge old "steam tractors", literally a couple hundred antique gasoline tractors, and a whole bunch of the hit-or-miss engines of all sizes and shapes . . . and everything works/runs/performs. It's a really big deal that draws considerable crowds, five days ending Labor Day every year.
Being in southeast Iowa in late summer, you can count on it being either hot and dusty or quite rainy and wet underfoot, but always quite humid. Dress for it. There is quite a large campgrounds on-site for everything from pup tents to motor homes.
There is a running narrow-gauge steam railroad as well as a turn-of-the-century trolley loop providing scenic views of the whole thing as well as transportation to/from the campgrounds.
Way too much to fully describe. If this is your thing, you will become addicted and return every year.