In Southern Sudan, in the valley of the White Nile, is the largest swamp in the world.
It's called Sudd (or Sёdd, Eng. Sudd).
In the rainy season, the area of the marsh area is comparable to England.
Swamp deemed impassable, even hard to swim here by boat, but there are people who have chosen this place - Sudanese fishermen.
Marsh vegetation is very prolific, most plants do not have roots and form a dense mass of floating, like a carpet and can withstand a lot of weight. On these islands there are huts of fishermen place.