The Sunken Columns is a location in the Frontier Legends DLC for Bloons TD 6. It is a rocky area next to the ocean, located west of The Coast. This place is the gateway to home of the Mermonkeys inside the Luminous Cove. The area is full of Roaming Bloons, which are more dangerous than usual because there is no grass to hide in this location. In the story, Sheriff and Scout follow Khai to here in their search for the tunnels, after promising him to not reveal the location, then the trio defend the area from an ongoing Bloon attack.
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