the only real place to not get caught is in your own house (not your parents' or a friends' etc).... anywhere else is risky, but incredibly fun there's always the car, a rooftop hidden by trees, a park under a blanket, public restroom, ummm..... *shrug* i like the outdoors personally, late at night...
as long as you are careful, you can have sex anywhere and not get caught. personally i've had sex on a grassy area right off the highway about 15 feet from a state police barracks. it was a blast, and no we did not get caught.
I got away with doing it in the washroom of a public library. Right by the kids section too. only problem was, everything (toilet, sink, hand-dryer) was motion-activated, so everything kept going off. heh, good times.
List of places I've managed to do it and get away with it too...:H Disabled toilets Change rooms at a clothing store Public toilets - That was a bad idea. Got me in a lot of shit [excuse the pun]