The Arabian Peninsula, one of the most strategically important regions of the world in canvased with magnificent geographical features, shaped by the interplay of climatic and geological variability over millions of years. The landscape of the Peninsula is endowed with majestic mountain ranges formed by tectonic upliftment from the collision of the African Plate with the Eurasian Plate and coastal plains formed from sediment buildup and tectonic activity. Towards the interior of the Peninsula are vast deserts rich in hydrocarbon accumulations and carved by aeolian forces. The Harrats or volcanic fields are remnants of past volcanic activity that further highlight the geological heterogeneity of the region. The paleo-environmental evidence suggests that the climatic history of the Peninsula is marked with fluctuations between humid and arid phases. Past records reveal what appears to be an arid desert now, once kindled rich biodiversity and a landscape occupied by numerous lakes. The region once had the presence of hippopotamus, buffaloes, wild cows, zebras, hyenas, sheep and camels. Lately, the discovery of the hydrocarbons in the region has triggered large scale economic development and urbanization in the region. Today, the Peninsula has some of the most developed modern urban centers in the world which are centers of world trade and visited by millions of tourists every year. Despite being rich in hydrocarbon and mineral resources, the region has seen a spell of intensified aridity, exacerbating water scarcity and environmental degradation largely due to changing climate and overexploitation and natural resources. Most of the groundwater resources stand depleted with an increasing reliance on the desalination, posing a serious challenge for long-term sustainability of the region. World over, the frequency of extreme weather events including heatwaves and flash floods, has also risen due to human induced global warming. Given its fragile ecosystem and long-term developmental goal, a comprehensive understanding of the geography and climate of the Peninsula is vital for predicting future climatic trends and formulating effective adaptation strategies in the face of environmental change.