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Built in 1908, the Oulujoki church is the only remaining wooden jugend church in Northern Finland. It is pretty, and a common wedding church. You can visit the church via Sunday masses at 10:00.
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Seikkailupuisto Huikia
A considerably expensive "adventure park" near the main swimming pool of Oulu. The park's courses are mainly many metres up on the trees where you move with, e.g., cable ropes. A fun and exciting experience for everyone.
In Sweden (to which Finland belonged from the 1300s to 1809), a "Kronomagasin" was a state-administered warehouse in which grain and other foodstuffs collected as tax were stored. Unfortunately, one can't go inside the warehouse any more since today it functions as an office for an architecture company. It is worth checking out from the outside though, the old wooden building sticks out amusingly from the 1980s apartment buildings and offers a reminder of the historical aspects of the city.
Summer's Sauna
A floating public sauna, open in summer. Run by volunteer workers.
Tiedekeskus Tietomaa
Closed for renovation until 2026 The oldest science museum in the country, mostly kinematic and interactive, great for pre-teens but plenty for adults to enjoy. It is partially located in the former Åström leather factory, and you can ride the glass lift up the 19th-century brick water tower.
Oulun Taidemuseo
Two-storey museum with a wide variety of modern artwork. Around 8 exhibits a year. Plenty of information in English, except for small, temporary exhibits.
Pelibunkkeri is a small arcade. Megazone is a futuristic laser tag adventure. Open rounds against random players, group reservations are welcome too.