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
198-14. Disrobing in public. No person shall disrobe under the boardwalk, on the beach or in any vehicle or truck while such vehicle is parked upon any public street or way or other public place in plain view of the public.
San Juan County Ordinance NO. 7 -1995 (Passed June 7,1995) People apparently will relieve themselves fewer times if there are fewer toilets.