hovering over a forested river valley, a futuristic eco-city with domed structures covered in greenery.

sustainable futuristic greenery modern architecture ecofriendly nature river forest advanced society technology domed structures ecocity eco cityscape innovation ecourban design environmental floating city ecosystem forested valley integration future civilization buildings environment habitat metropolis green hovering scifi living urban utopian eco-city covered merges cutting-edge natural landscape creating vision generative