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Features a viewing platform and a Foucault pendulum; a pendulum which showcases the rotation of the Earth.
© OpenStreetMap contributors
Yellow wooden church, finished in 1803 during the last few years of Swedish rule. As such it's also known as Kustaa Adolfin kirkko, Gustav Adolf's church, probably after Gustav IV Adolf who ruled Sweden (and Finland) at the time.
Olkiluodon ydinvoimala
The source of a third of Finland's electricity, with three reactors. Reactor number 3 was expected to be finished in five years, in 2010, but was not ready for use until 2023. The plant has a visitor centre with a science exhibition. Check in time whether booking is needed and what security clearance is needed (you at least need an official ID).