After being completely refurbished, it shines brightly beside the grey of the other granite stones around.

BBC: Polish spy Krystyna Skarbek remembered

First, the rock creases up into long slabs of concertinaed cliff before opening out into a huge granite-grey gorge, which takes any sound and echoes it into a feedback loop: shouts fade and return seconds later in irregular jumps.

BBC: The perfect trip: Southwest USA