On Hanger 18 there is a cinderblock floating at an angle above the ground about 3 feet. If you are sitting in the pilots seat it is up the small stairs. The stairs are located to the right of the pilots position in front of the plane. Approximately 50 feet to the right up the little steps.
The other is on Hazard in the middle of the map. I had a care package drop halfway into a rock. The rock is about ten feet from the main center line on the side away from the cliffs.
No big deal. It was more funny then "game destroying"