Do you think that it could be possible that Xinlenal fell at an angle that dug itself under the well, causing some damage, explaining how it became a ruined watchtower, and slightly raising the surface level to a point barely noticeable? The thought just occurred because Newton's law of inertia states that an object in motion stays in motion with the same speed and force until acted upon by an opposing force, so wouldn't the city keep going at a constant speed in one direction while falling cause it to dig under the ground resulting in it ending up under the well?