An initial intention was to give a tangible experience of the oil and gas reservoir Troll. By far the most valuable field on Norwegian shelf, it is hidden 2000 – 3000 meters below the seabed. The topography of the park is based on the geological layers, the “strata”, of the Troll field, reconstructed in a scale of 1:500. This “geo-landscape” was developed in an experimental sequence: The first phase was a digital maneuver, where the 15 geological layers were partly peeled away and exposed, creating a park sloping towards both the sun and the centre of the square. The second phase consisted of workshops with youth groups. Here, the functions of the sedimentary layers were programmed for activities such as biking, climbing, exhibition, concerts, jumping, ball play and chilling-out. The layer containing the oil, including its drilling wells, became a skating park, while geological folds were used as exhibition walls for graffiti and street art.