These islands, which do not belong to a municipality or region, are administered by the Danish Ministry of Defence. This makes the dialect difficult to understand for some Danish speakers.
The ruin of Hammershus, at the northwestern tip of the island, is the largest medieval fortress in northern Europe, testament to the importance of its location.Bornholm Regional Municipality, established January 2003 by the merger of Bornholm County with 5 municipalities, covers the entire island.Otherwise the merger would have to be abandoned altogether.The six municipal entities had 122 councillors (of which county clls were 15) and the new regional municipality would have 27 councillors from the start.Strategically located in the Baltic Sea, Bornholm has been fought over for centuries.
It has usually been ruled by Denmark, but also by Lübeck and Sweden.
The total area according to and Regional Key Figures) was 588.36 square kilometres (227.17 sq mi) (January 2016). The island is called solskinsøen (The Sunshine Island) because of its weather and klippeøen (The Rock Island) because of its geology, which consists of granite, except along the southern coast.
The heat from the summer is stored in the rock formations and the weather is quite warm until October.
Between Bornholm Airport and Copenhagen Airport by airplane it is 25 minutes.
The Ertholmene archipelago is located 18 kilometres (11 miles) to the northeast of Bornholm.
It typically takes 3 hours for passengers and freight (ferry :2 hours; driving :1 hour) to travel between Rønne and Copenhagen via Ystad in Sweden.