During their 2020 summer holiday, Prince Carl Philip and Princess Sofia visit different regions of Sweden and keep on sharing photos. This weekend, Prince Carl Phillip, Princess Sofia and their children Prince Alexander and Prince Gabriel visited Blå Jungfrun. Blå Jungfrun, also known as "Blåkulla", is a Swedish island in the Baltic Sea. It is located in the Kalmar Strait, between the mainland province of Småland and the island province of Öland.