Utøya (Norwegian pronunciation: [ˈʉ̂ːtˌœʏɑ] ⓘ) is an island in the Tyrifjorden lake in Hole municipality, in the county of Buskerud, Norway.

[4] The island was given as a commemorative gift by the Oslo Trade Union Confederation on 28 August 1950,[5] and it has hosted several political organizations' summer camps.

On 22 July 2011, a mass shooting took place at the AUF's summer youth camp, where 650 young people were staying.

Anders Behring Breivik arrived alone on Utøya dressed as a police officer and told those on the island that he was there for security reasons following the explosions in Oslo which he caused a few hours earlier.

While the AUF planned to rapidly rebuild and return to Utøya, others wanted to leave the island as a memorial to the dead.

Alice Greenwald gave advice about leaving some space on 'the ring', so that some of the bereaved can later change their mind – so that their deceased relative's name is permitted to be engraved on it.

[24] "The house will protect the memory of the 69 who were killed at Utøya", wrote the father of one of the massacre's survivors in a newspaper article.

Inside the café building, preserved (as of 2016) are bullet holes in walls, "the open windows where several youths jumped out to escape" the murderer; an old chart (that was there in 2011) that says "you must know the past, to understand the present and peer into the future", and pictures of dead victims; at least one heart-shaped stone, with the inscription "Missing you [singular]", lies on the floor.

[27] In 2016, Oliver Wainwright named it one of the "top 10 buildings of 2016", adding that "the Hegnhuset on the island of Utøya makes a simple, powerful record of an event that shook the very foundations of Norway's national identity.

The cafe building, where Anders Breivik murdered ... before killing a further 50 on the island, has been retained as a stark relic, its walls sliced with Matta-Clark rawness, and encased in a simple timber and glass pavilion".