Yep, those are awesome creatures for sure.
I was driving through South Dakota a buncha years ago and wanted to rest. I saw a rest stop sign and followed the signs which took me off Interstate 90, an exit. I never encoutered that before, all the many rest stops I have been to have been right on the interstates. Anyway, I pull off I-90 and as I enter the rest stop, I see a sign saying something like don't feed the buffalo/bison or stay clear; something like that. I was thinking "man that sign must be old". Sure enough, I park and see this monster of a bison grazing about 50 yards outside the perimeter of the rest stop. I was in awe... I am a city boy.
Very cool experience.