Ertholmene, Protected archipelago and Ramsar site in Baltic Sea, Denmark
Ertholmene is an archipelago of three main islands in the Baltic Sea covering about 39 hectares and protected as a Ramsar site. The islands are connected by walking paths and accessible by ferry from the nearby island of Bornholm.
Danish authorities established permanent settlements and granite fortifications in 1684 to strengthen their naval position during conflicts with Sweden. These military origins shaped the layout and construction of the islands that visitors see today.
The small community here lives by traditions that shape daily life, choosing no motor vehicles and maintaining homes in historic buildings. This way of living creates a distinct character that visitors immediately notice when exploring the islands.
Access is by ferry from Bornholm, and you should wear sturdy shoes since you will be walking on paths between the islands. Keep in mind that motorized vehicles and bicycles are not allowed here, so walking is your only way to explore.
One of the islands, Græsholm, serves as a bird sanctuary where waterbirds like Common Guillemots and Razorbills breed in colonies. This is the only place in Denmark where these seabirds gather in such numbers to raise their young.
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