Aurora is a metropolis built on a delta at the edge of a large waterfall, and is the city that the main character lives in in Monster Rancher Battle Card. The houses are mostly white stucco with red clay tile roofs. This is probably the city that Genki imagines at the beginning of the anime series, and is also most likely where the Searchers meet Hare in a monster battle.
Aurora is the largest city on Aurora Island, and is within easy traveling distance of the Tagi Jungle, Black Mountains, and Mandy Desert. The waterfall that the city rests on drops off into Heaven's Canyon.