Bosnia and Herzegovina is an almost landlocked country – to the south it has a narrow coast at the Adriatic Sea, about 20 kilometres (12 miles) long and surrounding the town of Neum. It is bordered by Serbia to the east, Montenegro to the southeast, and Croatia surrounding north and southwest. In the central and eastern interior of the country the geography is mountainous, in the northwest moderately hilly, and the northeast predominantly flatland. The inland, Bosnia, is a geographically larger region and has a moderate continental climate, with hot summers and cold and snowy winters. The southern tip, Herzegovina, has a Mediterranean climate and mostly mountainous topography.