I'm a big fan of fire towers. The idea of being a watchout in the Missouri wilderness is a bucket list thing. However, even though there is a fire tower in Missouri you can hike to, don't even think of climbing it.
Normally, the more beautiful the hike the more difficult it is to do. This Illinois hike is the exception. It's a short hike that just about anyone can do, but it takes you through scenic and massive rock canyon walls.