A captivating image of a futuristic city nestled within green hills, featuring a prominent spherical building at its center. This cityscape combines advanced architectural designs with eco-friendly principles, showcasing vertical gardens and lush greenery integrated into urban structures. The spherical building stands out as a symbol of innovation and sustainable development. This image is ideal for illustrating concepts related to future urban living, eco-friendly technology, and sustainable city planning, highlighting a harmonious coexistence between nature and advanced infrastructure.