In the south Herzegovina, in a typical karst landscape, on the left side of the Neretva River, is Hutovo Blato, the unique sub-mediterranean swamp in Europe. It is known from ancient times as a green oasis, with an abundance of water in which the conditions to live have found a large number of plant and animal species. The swamp is interesting and important from ornithological, ichthyologic, scientific, environmental and tourist point of view.
Hutovo Blato is considered one of the largest bird winter ports in Europe. This area is located around fifteen kilometers from the Adriatic Sea, so it is heavily influenced by the mediterranean climate.
Hutovo blato is a home to over 160 species of birds and more than 800 species of plants.