In the Badlands lies a lost Mars Rover from our era. To find it, head east on your map in the direction of the safehouse(In the Badlands). Just before reaching the safehouse, keep looking to your right. Eventually, you will see a large collection of ore. Behind it all is the rover. Heres the location and pic
Warning Do not crouch under the rover or the game will freeze. You will not be able to pause the game or exit it without restarting your system.
(Confirmed on the PlayStation 3) (Confirmed on the Xbox360) (Confirmed on the PC)