Viilto

I’m not sure what Viilto refers to in this context. Could you specify what Viilto is (a person, a place, an organization, a concept, or something else)? Any context (region, field, or timeframe) will help me draft a concise, neutral wiki-style article under 300 words. If you’d prefer, I can also create a clearly fictional stub (for example, a fictional town or project) in a neutral encyclopedia style.