The mare surface around Maestlin is dusted with ray material from Kepler.

When the sun is at a low angle, multiple ghost-craters are visible in the mare surface to the south-southeast and north of it.

At the west end of the bay is a finger of mare surface that extends to the northwest for almost 100 km.

These features are low, sinuous ridges formed on the mare surface that can extend for up to several hundred kilometers.

The mare surface was like a gentle sea, a complex of overlapping, slowly undulating curves.

The feature has a higher albedo than the relatively dark mare surface, with a diffuse appearance and a distinctive swirling, concentric oval shape.

The mare surface around the craters is also lightly marked by rays from other craters.

Of the original structure of Puiseux, only the upper part of the rim remains above the mare surface.

Moreover, the mare surfaces are slightly tilted, whereas a deep pool of liquid would solidify with a horizontal surface.

Just to the west is a wrinkle ridge in the mare surface, a feature that is prominent only under oblique lighting from the Sun.