Crater
A crater, but usually basins are much bigger than your average crater. So they are known by another name since often their characteristics are slightly different; the proportions of the impacting object are larger.
Crater of Diamonds is an ancient volcanic crater that contains diamonds in its rocks.
Chicxulub impact crater.
Alcatzervater Crater
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!
The ramon crater
crater lake
Dark Crater has 15 floors, then there's Deep Dark Crater, which is another 14, then finally Dark Crater Pit, the final floor. 30 in total.
They've changed the website name for Pokémon Crater. http://pokemonbattlearena.net
Pokemon crater-battle area{beta 0.1}
Crater Lake is actually the crater of an extinct volcano. Water has filled in the cone crater.