Karst City is the second area in Momodora: Reverie Under the Moonlight. It is where Kaho first meets many of the recurring NPCs of the game. It connects to all but 3 of the other areas of the game, making it a hub or crossroads of sorts.
After defeating it's boss, Lubella, the player can access the Forlorn Monastery, the Subterranean Grave, and Whiteleaf Memorial Park.