is a former name of the Bohaterów Getta
street in Warsaw, as well as a name applied to the entire borough around it. The street runs from the Długa street in the New town towards what was the northern outskirts of the city in 19th century, and the neighbourhood of Muranów
. Until WWII inhabited primarily by Jews, after the war it was rebuilt only partially. The name of the street and the area is derived from marshes that used to cover much of the area in 18th century.