Our dahal was nine kilometres north of Shaw'yah and it was bigger than we expected. The surface probably collapsed making a big hole of about 20m across. Concrete pillars were put on the perimeter to protect motorists from accidentally falling into it.
We went down a little to check it out and found plants growing. These sinkholes were valuable sources of water for old caravans travelling in the desert. Unlike the poet who hid his rifle, we decided to stash our cache few hundred meters to the east of the dahal.
We then continued north and found another set of dahls where a cache was hidden here. Unfortunately we had no gear to climb down and so took some pictures instead. On our way back, we came across a herd of camels and gave them the right of way.