Linnankoski

Could you specify which Linnankoski you have in mind? There are multiple places with that name in Finland (for example, different districts or villages, often tied to a local river rapids or historic site). If you can indicate the municipality or region, I can write a concise, neutral wiki-style article tailored to that particular Linnankoski. If you prefer, I can also produce a short disambiguation-style article covering the main Linnankoski locations.