island. The former Oulu Marine School's observatory has been built on the ruins in 1875. Nowadays the observatory is used as a café. Most of the Raatinsaari island is taken by the Raatti Sports Centre, which includes the Raatti Stadium, a practice field and the Raatti indoor swimming pool. The Qstock rock festival has been held in the Kuusisaari island from 2003. In recent years the festival area has expanded to include a part of the Raatinsaari island too.

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