Ruined Cobblestone Jungle City

The jungle could receive a ruined cobblestone city. Walls reminiscent of the nether fortress could block the perimeter, and house crumbled houses inside. A new block could be found here, The Crumbling Wall block, a Cobblestone wall, but with holes in it. Rubble could lay at the feet of this crumbling wall, contained in 1 block. When the wall expands, it works like a regular wall, but the holes dot the surface, giving a ruined vibe. This comes with a mossy varient. A broken fountain could sit in the city. center, with a mixture of wood, cobblestone and dirt path blocks branching away around the city This city would be carved into the jungle landscape, but generate trees inside its walls to conceal it from the outside world. If this structure is added, Jungle specific plant life would be amazing to spice up the surrounding landscape.