Structure: Lost Fortress

The lost fortress would be a new (and extremely rare) structure. It would be a series of turrets connected by fortified bridges made out of deepslate bricks, tiles and more. These fortresses would be filled with armor stands and loot in the hallways. There would be a basement with treasure, but it would be set with some traps. The fortress would be abandoned and would be filled with monster spawners. They would generate on the surface of the overworld and make a big ring until it makes a circle around an area that would all be farmland. I can see them generating through mountain ranges and over rivers. I think it would be an interesting addition to the game that also would be a place to loot and use for mob farms.