Southeast European nation of Bosnia and Herzegovina is located on the Balkan Peninsula. It is also referred to as Bosnia-Herzegovina and simply as Bosnia. It shares borders with Montenegro to the southeast, Croatia to the north and southwest, and Serbia to the east. Its only sea connection is through the town of Neum. The coastline stretches 20 kilometers (12 miles) in length along the Adriatic Sea toward the south. Bosnia experiences scorching summers and chilly, snowy winters due to its mild continental climate. The topography is mostly flat in the northeast, somewhat hilly in the northwest, and mountainous in the middle and eastern sections. The smaller, southern region, Herzegovina, is largely mountainous and enjoys a Mediterranean climate. The largest and capital city is Sarajevo.