In the spirit of rock bothering and caves, here's one from a trip in the mid nineties.
As a bit of a clue and to give some scale the photo was taken looking up and the diagonal white line going down to the right from the central bright spot isn't a scratch on the photo but is a rope with someone abseiling down it on his way into the cave.
Majlis Al Jin, Oman?
That's the one!
Still the longest single abseil I've done which definitely makes it the longest single rope ascent. Certainly felt like a long way, about 165m from the plateau to the floor of the chamber.
