You can see little black dots all the way to the horizon, 15 to 20 miles away. (Cattle of a thousand fields!) Search "Kansas flat landscape with cattle". I would post one of them but they are mostly Getty images and they still do not get a sense of the size.
Here is a picture taken half a state from where I am, way to the southwest, but here is one of some Cattle on the Santa Fe trail. The local historical society has determined that the the KC end of the trail it passes within about 30 yards of my house but is all covered over with Tract Housing except for some ruts that still exist in a local park.)
Ok, enough Travelogue stuff! Most people know what the horizon looks like!