Mercury's surface is covered in impact craters, ranging in size from tiny pits to giant basins hundreds of kilometers across. The surface also has a number of large, smooth plains, which are thought to be volcanic in origin. Mercury's surface is also heavily fractured, with some fractures extending for hundreds of kilometers. These fractures are thought to be caused by the planet's cooling and contraction over time.

Overall, Mercury's surface is a complex and varied landscape, which has been shaped by a variety of geological processes over the planet's history.