Blå Jungfrun, also known as "Blåkulla", in English sometimes rendered literally as The Blue Maiden[2] is a Swedish island in the Baltic Sea.

Administratively, the uninhabited island is part of the municipality of Oskarshamn and covers an area of approximately 0.7 km2 (0.27 sq mi) with a mean height above sea level of 86 m (282 ft).

Home to black guillemots and a Swedish National Park since 1926, freedom to roam at Blå Jungfrun is limited with visitors prohibited from staying overnight on the island or making fires.

[3] In 2014 the island became object of archeological interest when a group of researchers discovered a cultural layer after probating the soil.

At the time the authorities had given them the permission to only operate in a small area and could not take samples; three years later they were able to recover shards made out of quartz, which date to the Stone Age and had been probably produced by a settlement of hunter-gatherers.