Mustankiven puisto (Black Stone Park) has been made on the site of a former quarry in Helsinki's Vuosaari. Anu Kiiskinen's landscape work, Elo, modelled out of earth and stone, snakes through the park. The materials used for this landscaping are earth and local black stone, both crushed and in large blocks.

Kiiskinen's steel sculpture Eilen tänään huomenna (Yesterday today tomorrow) was created alongside the plan for the park and was already set up in a small open area on the park's west side a few years before the completion of the park itself. The sculpture is sited by the park's western entrance, beside a playpark, and along with the landscape work, naturally links into Vuosaari's marine setting. The material of the sculpture is 2x3-metre blowtorch-cut Corten steel sheeting.

Commissioned by Helsinki City Art Museum