UKK

There is more than one thing called UKK:

Finland
UKK is an acronym for Urho Kaleva Kekkonen, President of Finland 1956–1982:
 * Urho Kekkonen National Park — the second largest national park of the country, established 1983
 * UKK trail — a thousand-kilometres trail from Koli to the UKK National Park, established by UKK hiking it in 1957.