For Greener Fields
The rolling hills that lead to the moving ones are easy enough to navigate, although they provide a poor view at the moment. As the group crests a rise overlooking a grassy, shallow valley that runs roughly north-south, they get their first good look at their objective.
What they see is not geography, but biology. Great, multi-legged creatures that seem like a monstrous, armored cross between a long-necked turtle and a tardigrade with impossibly long legs come into view in a slow, meandering herd. Perhaps 30 of the creatures are spread out over a mile or more, slowly grazing on vegetation below.
OOC: You've come about 3/4 of a mile from the cart. You can make a Perception or other check to notice additional info. If you do, please let me know what, specifically, you're looking for.