With a massive construction and reconstruction drive, the city of Riyadh is staged for an unprecedented transformation led by the ambitious Vision 2030 of the Kingdom of Saudi Arabia initiated on April 25, 2016. This chapter preludes by examining the historical evolution of the city of Riyadh, focusing on the interrelated relationship between urban growth and the natural environment. It identifies key challenges and underlying opportunities in the city’s efforts to achieve environmental, economic, and social sustainability. Central to the chapter is a scrutiny of transformative greening initiatives, particularly the Green Riyadh Program and other environmentally responsive urban projects, designed to enhance climate resilience, improve air quality, increase green space per capita, and elevate overall resident well-being. They hold the promise of a thriving future, driven by ecological urbanism and humanisation initiatives that represent a qualitative shift in the urban development paradigm across the Arabian Peninsula. The chapter infers that the development approach surpasses superficial greenery to develop a city that adapts to its environment and maintains natural system connections responsive to its specific context. The Green Riyadh Program, known as the “most ambitious urban greening project in the world,” is one of Riyadh’s four giga projects launched in 2019 by King Salman Bin Abdulaziz, the Custodian of the Two Holy Mosques, and seeks to position the city amongst the top 100 most liveable cities globally. Encapsulating the significance of these projects in shaping a climate-resilient and equitable city, the chapter concludes by casting light on the deeper meaning of ecology, as propelled from a philosophical and scientific base of knowledge, to drive further research into networks of action in support of the sustainability of the paradigm shift in the Kingdom of Saudi Arabia.