When I was quite a lot younger and braver than I am today I took a TB9 into (and out of!) the strip which used to be at Westbury sub Mendip. As well as being narrow (wingtips through the brambles when doing a 180 at the end) and short, it had a gentle curve as it is actually the disused railway track.
For those looking on Google Earth: 51°14'02.22" N 2°43'31.17" W
Warnervale, NSW, doesn't leave much room for error before departing the hard surface either. At least the strip there isn't edged by scrub and brambles though.
Lat: 33° 14.45' S Long: 151° 25.84' E