This cache is near the Dairy Barn (yes, there is a barn located on campus). If you are lucky, you may get to see the horses that live on campus (they are often in the pasture to the west of the barn), or see the veterinary students walking horses from the teaching hospital back to the barn. Horse owners will often bring their animals long distances to see the specialists at OVC. The hospital even has an MRI machine large enough to accommodate horses, cows, and other large animals.
You are looking for a container similar to a bison tube. At the time of publication parking is free on campus after 5pm on weekdays, and on weekends, however please check for parking signs and check the parking website for updated rules and regulations. Cache is not winter friendly. Watch out for muggles!