In the past as the brave scientists of cobalt would hold back the onslaught of rust players and try to stop them from reaching the island they set up a compound to hold them back. This however ended up with them getting attacked at some date and being overrun. The green card puzzle inside of it is still operational though and with a fuse and a green card you can get your hands on a blue card and a mighty fine bit of loot. to be specific in the monument there are 3 normal crates 1 gun crate and a medical crate. The monument has a total of 207 prefabs.