This oddity is a transportation vehicle that was left here many, many years ago. The listed co-ords will take you to it. To find the cache, stand at the back of the vehicle. Travel 240 degrees true until you find a break in the fence. From there, look South for the largest object. Count four to the right (they're not in straight line and perspective may fool you), the cache is at the base. You may have to reach around/thru some brambles. I did it this way to prevent muggles from discovering the cache while viewing this oddity.
The container is a Lock and Lock.
9-08-2021 update: Due to activity near GZ, the cache site has moved. After counting to four, let you eyes continue right until you see another large item (a split item may be in your line of sight, but they are right next to each other). When you arrive at this large item, look for the sleeping one and check the head.