Nope, genuine artefact. Its a fighting pit for Captain James T Kirk - you'll find a Metron ship in orbit watching you...
I guess there's a problem with the planet's procedural generator ...
Maybe the planet is made of caramel cream, and got whacked with a marshmallow. It's possible!
Nice paint!You don't really get a sense of scale from these stills, but the highest ridge visible in the first picture is the one I'm landed on in the second two. It's about 6km above the moon's surface, and so narrow that I nearly lost the SRV down the side when turning around to return to the ship.