Mysterious shrub on Cliffside:
In Spectator mode on Cliffside, look down the cliff at the beach. To the left there is a small crater on the beach where a mortar shell has hit. Fly down through the crater and keep going down to eventually go into some invisible water. Come up out of the water a bit and look around to see a large bush nearby in the mist. It is just floating there very far under the map.