MOAB Graveyard is a special mission in Bloons Monkey City. In this mission, you have to pop MOABs, BFBs, and ZOMGs. Round 1 consists of 10 MOABs, Round 2 consists of 6 BFBs, and Round 3 consists of 2 ZOMGs. They will come out one by one and not all together to make it easier. You get $30,000 cash to start. This mission contains no D.D.T.s, probably because it would make the level too hard.
In the background of the MOAB Graveyard's track, there are three MOABs, the tail of one BFB, one ZOMG, a skeleton of what appears to be Vortex, and a skeleton of an unknown blimp, possibly Bloonarius or the gray hot air bloon from Hot Air Bloon. It may of also been hinting the B.A.D introduced in BTD 6. It Could also be a reference to the Hindenburg, the largest airship ever.
A total of 3904 red bloons appear across all three waves.
23180 non-MOAB class bloons are popped throughout all three waves.
The supposed MOAB frame in the top right could be an Easter egg suggesting an even stronger MOAB Class Bloon. Not only is it much larger than a Z.O.M.G. but it appears that it is much older with the fragments being gray and much more tattered than the M.O.A.B. or the Z.O.M.G. frame or maybe this MOAB class bloon is gray in color.