[4] It was officially opened in August 2019 by its patron Princess Benedikte.

[10][11][12] Two scout organisations, Det Danske Spejderkorps and KFUM-spejderne, bought the island in April 2015[13] for 20 million kroner (£1.94M) with money donated by the A. P. Møller and Nordea funds.

[14] The two Danish scout organisations intend to develop the facility, at a cost of 25 Million euros,[5][15] as an adventure playground[16] "for the development of children and young people " (not just scouts) "into active, engaged and curious people who take the lead for positive social change",[17] with space for 400 campers.

[7][1] A youth summit entitled "Young Europe Cares" was hosted by youth activist group "Young Europe Is Voting"/Youth4Europe at the Ungdomsøen in May 2019.

The fortress remained an active military installation until 1984; in 2002 it was sold to a private investor.