Found this bit in the game's code; a piece of land aptly named "terrain.iff". Took a target buoy file and changed the mesh to this terrain.iff file, then put it in a mission. Normally I'd bounce off the hitbox before I could even get close to it but by turing off collisions you can into the hitbox and... here we are. What might've or could've been. However as far as I know, planetside missions were never planned for WCP so...what's the deal? Was it something leftover from Wing 4?
Vampire for scale so you can see just how big the mesh is.