This photo is also an HDR from three slide scans. Again, I’d retained in my slide collection three versions of this scene, each about 1EV in separation. So I scanned all three and then blended them in Photomatix to get this result.
It’s most likely taken in the same vicinity as yesterday’s photo, near Graskop in South Africa.
I used to carry a set of Cokin filters with me (still have them but use them less often today) so I’m guessing I used a neutral density filter to be able to slow down the shutter speed enough to blur the streaming water into these soft white trails.