Life in the GCC, dominated by an extremely hot climate, was possible thanks to the karstic underground water system and its manifestation as oases. Oases, offering water, shade, and palm groves, provided food and created substantial climate mitigation, making social life possible within the desert. Oases-based settlements and coastal urbanisms generated the unique circular economy system for what we know today as Gulf Countries. Green infrastructures, already a must in worldwide urbanism, have become a fundamental tool for the quality of life in future GCC cities.