Some type of grass. Hopefully someone else can add information.

It's very difficult to ID many grasses without seeing blooms and closeups of leaves and roots, but that looks suspiciously like Sorghum halepense, johnson grass. Is that growing in a wild/unmown area? If it's a maintained area, you do NOT want johnson grass in it. It is a very aggressive spreader.

Yes, it’s in an unkempt area. I’ve heard people curse Johnson grass, but I didn’t realize it was naturally this big.

Unmown johnson grass can reach four or five feet in height, or even more in improved soil. In my fields it regularly hits four feet between hay mowings, even in very dry years. It will suck every bit of moisture from the ground and remain green while other grasses die or go dormant. It's a thug.