Tol Brandir

Tol Brandir, also called the Tindrock was one of the three peaks at the southern end of Nen Hithoel. Unlike Amon Hen to the west or Amon Lhaw to the east, Tol Brandir was a mountain-island; the Anduin split into two arms and flowed on both sides of the peak before rejoining and plunging over the falls of Rauros. It was situated a little to the north of its companions and it was possible to paddle a boat across the river on it southern side above the waterfall.
It was said that no foot of man or beast had ever been set upon Tol Brandir, which is understandable because its sides rose sheer out of the water. High above the initial cliffs there were steep slopes with trees, but then more grey cliffs shot up with a final spire of stone at the top. Being inaccessible to other creatures, many birds nested on the island.
When Frodo and Sam cross to Amon Lhaw, they paddle across Nen Hithoel to the north of the island rather than to the south. This is necessary because, unlike in the book, the river does not reach beyond Tol Brandir, instead the falls of Rauros are split by the pinnacle.