https://en.wikipedia.org/wiki/Al_Naslaa
Looks like someone small could do laps round it forever. Who might I be thinking of? Theoretically at least (petroglyphs).
Must be a tempting target for the cairn topplers
> https://en.wikipedia.org/wiki/Al_Naslaa
Looks pretty hard, with a harder start. I am betting E3 5c
Very cool. And it seems graffiti is a problem the world over
> Very cool. And it seems graffiti is a problem the world over
Though some of it looks quite ancient.