When it comes to public nudity, there are many different opinions what it is really about. Public Invasion for example is neither public nudity, nor public sex, it's outdoor, not public. It sells well, but it's a different niche.
A very good and unique real public nudity site is
http://www.nudeinpublic.tv
Terryvision is great, too, but more focussed on sex, not nudity.