That largely unexplored jungle and river area - with tens of flat-summited mesas (tepuis) and hundreds of waterfalls (including Angel Falls, the world's highest) cascading from their tops - contains important deposits of gold, platinum, and diamonds and may yield rare and strategic minerals.

It was now dark and the falls were pale and grey, reflecting only the lingering moonlight of the western sky.

This is the Window of the Sunset, Henneth Annûn, fairest of all the falls of Ithilien, land of many fountains. Few strangers have ever seen it.

Its dark hurrying waters ran across the path before them, and joined the Silverlode in a swirl of dim pools among the roots of trees. ‘Here is Nimrodel!’ said Legolas. ‘Of this stream the Silvan Elves made many songs long ago, and still we sing them in the North, remembering the rainbow on its falls, and the golden flowers that floated in its foam. All is dark now and the Bridge of Nimrodel is broken down.