Natural lakes in Bosnia and Herzegovina take 67.5 square kilometres (26.1 sq mi), which is a little more than 0.12% of the total surface area of Bosnia and Herzegovina. Buško Blato is the largest lake, its size being 56.7 km². Blidinje lake is the largest natural mountain lake in Bosnia and Herzegovina, with surface area varying between 2.5 and 6 square kilometres (0.97 and 2.32 sq mi), and Buško Blato lake with its size of 56.7 square kilometres (21.9 sq mi) is the biggest artificial accumulation in Bosnia and Herzegovina; however it is forgotten that this lake was made from accumulation of water from the Buško Blato marshland, earlier natural slough and morass system. The total size of all lakes is 1/10 as large as the world average. Because of this, natural lakes in Bosnia and Herzegovi