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
Chapter 113 § 6 Sec 6. No person shall within the view of any dwelling house or of any public road, street or wharf, in the day time, bathe or swim without necessity, or expose his person indecently in dressing or undressing for the purpose of swimming or bathing, or otherwise, without necessity.