Coordinates: 42°55′54″N 22°57′42″E / 42.93167°N 22.96167°E
The Dragoman marsh is the biggest natural karst wetland in Bulgaria. It is situated only 35 km north-west from Sofia and covers a valley between the limestone hills Tri Ushi and Chepan.
The marsh is a protected sanctuary for birds. Over 200 species have been recorded in the area. Some of them have a high conservation status.
The area is often visited by nature lovers and environmentalists, who use for free the facilities built there: a watch tower and an eco-route.