In the UK there is exemption to the 500 foot rule for hill soaring (according to BGA Laws and Rules p 33). We regularly fly much closer than 500 foot on the small 300 foot ridge adjacent to our airfield. It would be quite normal to soar down to say 100 foot over the ridge. Soaring gliders in this location are regarded as a tourist attraction (and no, not only by members of the gliding club!).