surreal floating island city with lush greenery and waterfalls amidst clouds fantasy urban eco concept art

tower conservation verdant greenery digital art residential fantasy foliage peaceful sustainable technology rooftiles sci fi terraces serene clouds utopia vertical imaginative ecology high rise aerial urban science fiction eco city surreal visionary paradise dense island sky metropolis modern balconies friendly habitat majestic buildings dream tranquil landscape futuristic nature floating ethereal waterfall heaven