So it's a scene connected to the "three in a boat" foretelling (but not the actual boat scene itself). There's weirdly water streaks around. Gallo mentions it's a funeral pyre, though that looks more like a weird stone cairn to me, unless that's supposed to be sung wood or something Aviendha or Elayne made with the power (kind of a miniature DM, on which Rand is placed).

I'm really not a fan of Sweet's work, though I find this one is simpler and not quite as bad or "offensive" (to good taste) as many others were. It has a very Arthurian ambiance.