Some of the flattest ground anywhere on Mars.
Vastitas Borealis East is the eastern sector of Mars's great northern lowland, containing some of the smoothest, flattest terrain on the entire planet. Like the rest of Vastitas Borealis, it is interpreted as a possible ancient seabed mantled in sediment and ice.
Claim your plot here →The eastern lowlands are remarkable for their flatness — at large scales this is among the smoothest terrain measured anywhere in the solar system. That smoothness is a clue: standing water and settling sediment tend to level a surface, which is one reason the region is read as a possible former seabed beneath the vanished northern ocean.
Vastitas Borealis East borders the huge Utopia and Isidis basins, and beneath its sediment mantle lies extensive ground ice. Preserved layers here could hold a record of Mars's wetter past, and the flat, stable ground makes the lowlands attractive for imagined future landings.