Geosenge Town (Japanese: セキタイタウンSekitai Town) is a grassy town that includes Hotel Geosenge, a Pokémon Center, and its main attraction is the three mysterious stones in the center of the town, which are said to have mysterious power. Underneath these stones lies the Ultimate Weapon, as revealed when the player enters the Team Flare Secret HQ for the second time.
The town's houses were turned over when Lysandre unleashed the Ultimate Weapon. Only one house was not leveled. After fighting Lysandre for the last time, he activates the machine but it backfires, destroying the machine. Geosenge Town was left with a huge crater in its center.