The 777 mile (1250 km) wide „Sea of Rains“ still clearly shows its origin from a meteorite impact. In the south, it merges with Oceanus Procellarum, while its northern border is marked by mountain ranges. In addition to various lava flows, it also contains two larger craters – 52 mile (83 km) Archimedes and 36 mile (58 km) Eratosthenes.