For 10 points, name these isolated areas of water and fertile land in deserts.
Anthropologists like Georg Steindorff investigated traditional homosexual behavior in a town in one of these natural features. Ralph Bagnold and László Almásy (LASS-low ALL-mash-ee) led separate expeditions to discover a legendary one of these features called Zerzura. During World War I, the British drove out the Senussi from many towns on these features. Salt deposits near a temple in one of these features were the first to be called "ammonium." One of these features called Ein Gedi in Israel is home to a kibbutz and a popular spa. Notable examples of these features include Siwa and Ghadames (gah-DAM-ess). Many of these features in the Gourara region of Algeria support the cultivation of dates. For 10 points, name these isolated areas of water and fertile land in deserts.
Anthropologists like Georg Steindorff investigated traditional homosexual behavior in a town in one of these natural features.
oases [or oasis; prompt on lakes; prompt on deserts] &lt;Thompson&gt;