Local authorities can impose fines on people hiking nude in the Alps in the conservative canton of Appenzell.
http://www.bbc.co.uk/news/world-europe-15785219
http://www.bbc.co.uk/news/world-europe-15785219
Sec. 14-9. Bathing in public; suits required when. It shall be unlawful for any one to bathe in any pond or branch within the corporate limits of the city between daylight and dark unless provided with suitable bathing suits, and no person shall bathe in the river anywhere between the north limits of the city…