what's the kinkiest or most public place you've had sex or masturbated?

[Tall Sweet Guy]

my wife used to tell me stories of catching couples in a library where she worked ... and we've done it in stairwells, and on a riverbank with people around ... as I have with others also.

I once saw a couple at it on the same riverbank in daylight!

Was a little hard to concentrate on the golf after that - especially as I was playing with a female friend ...