Here are a few sites from some friends in the voyeur porn niche. They are topnoch sites to, if you have a chance, make sure you visit them.

Voyeur Sex Porn - Genuine voyeur porn footage and outdoor sex.
Secret Voyeur Sex - Super secret voyeur phots and videos and outdoor dogging sex actions in here!!!
Candid Camz - Public nudity and outdoor sex shot on the streets and beaches with candid cameras.
Teens Dogging - Teen sex on public places, hidden cameras and voyeur footage
Pervert Voyeur - Hidden camera pics and security cam sex videos
Porn n Public - Acts of public sex and hidden cameras
Sex Spies - A site for the true lover of voyeur
SpyFuck - Real voyeur videos and real voyeur pictures brought especially for you.
Secret Cam Voyeur - Spycam Sex
Skirt Slut - Upskirt shots of slutty teens in tight and short skirt
Fucking Caught - Amateurs caught fucking on photos and videos
Public flashing girls - Girls flashing in public