'''Bosnia and Herzegovina''' ( / , ), abbreviated '''BiH''' or '''B&H''', sometimes called '''Bosnia–Herzegovina''' and often known informally as '''Bosnia''', is a country at the crossroads of south and southeast Europe, located in the Balkans. The capital and largest city is Sarajevo. Bosnia and Herzegovina borders Serbia to the east, Montenegro to the southeast, and Croatia to the north and southwest. It is not entirely landlocked; in the south it has a narrow coast on the Adriatic Sea, which is about  long and surrounds the town of Neum. Bosnia, which is the inland region of the country, has a moderate continental climate with hot summers and cold, snowy winters. In the central and eastern regions of the country, the geography is mountainous, in the northwest it is moderately hilly, and in the northeast it is predominantly flat. Herzegovina, which is the smaller, southern region of the country, has a Mediterranean climate and is mostly mountainous.