This marsh is located to the west of the Dead City and northwest of the Yantar area. It is enclosed on all sides with barbed wire and littered with rotten catwalks and abandoned hamlets. A road leads through the middle of the swamp, guarded by watchtowers.
Two bridges lie on the road, the first is collapsed, the second intact, but blocked with concrete blocks, cutting off access to the mysterious Tuzla tunnel.
Little is known about what the player was supposed to accomplish here. According to a blurb on the old version of the STALKER website, the Phantasm mutant was supposed to be fought here, although the veracity of that is doubtful. Due to the fact that Spetsnaz operators and military stalkers are present in nearly all screenshots of the location released to the public, it's possible that the player was supposed to fight them at this location for reasons not known.