Deir ez-Zor

Deir ez Zor, also called Dayr az-Zawr, Deir al-Zur and other variants (Arabic: دير الزور; Armenian: Տէր Զօր or Der Zor), is a city in northeastern Syria on the Euphrates river.

Southwest towards Tadmor (Palmyra), Damascus
There's a big roundabout at the end of town, where you, walking in direction Tadmor, can find a water supply after some 200m walking. From there you can easily hitch and find some shadow (see the guy on the left inside the picture). Traffic is low, as the next city (Palmyra) is a 200 km ride away. You for sure don't want to get stuck in the desert inbetween!