Just north of Yeroham on road 204, you will find on the west side of the road (that would be the left if you are traveling from Yeroham toward Dimona), a small hike in the desert to find one of the most amazing flowers. The Helmonit (so named because helmon is the yellow part of the egg and the flower has this color), is found in very rocky outcroppings, pushing up its yellow blossom into the stark desert surroundings. There are several state parks in the southern parts of Israel that were established to preserve these wonderful flowers. Another is just a few kilometers from Arad which we visit every year in late October or early November when they are in bloom.
If you take the road out of Yeroham (route 225) toward the Maktesh Gadol, you will enter the Maktesh on a very steep winding road...while you are still far above the valley floor there is a good place to stop to see the valley, keep an eye out for this, it presents a stunning view.
If you don't mind a 15 minute hike, after you leave the Maktesh Gadol, proceed to the Maktesh Katan...go east on route 225 till you reach route 206, turn left and go for about a kilometer, then turn right onto route 227. After about 4-5 kilometers you will see a dirt road turn off to the left, take this till you see a cleared area on the right for parking, you should see also a sign saying "Mitzpeh Eli" marked in red, you should be able to follow the red markings to the crater rim (it is about a 1.5 kilometer walk each way, don't forget to take water) where you can see in the picture Xiao is taking her picture.