This WHS is one of my favourite and deserves at least 3 full days to get a glimpse of such an immense site. There are several trekking trails to follow and others for you to discover and complete and peaceful solitude. The Treasury from the Siq is jaw-dropping but so is The Monastery (Deir). The colourful rocks close to the public toilets are incredible and the whole archaeological site is huge. Be on the lookout to spot the striking Light Blue Lizard that lives in the valley - really unique.