Mystery of the camel carvings
These carvings are easy to spot at over 10 metres high on the side of sandstone cliffs, yet it wasn't until 2016 that they were discovered in the Java Province of Saudi Arabia.
It is thought that shifting sand dunes may have hidden and protected them from the worst effects of erosion, otherwise they might have worn away completely.
Read more at https://stevensweeney.substack.com/p/mystery-of-the-camel-carvings