Beautiful secret city inside cave with water, plants, flowers, roses, intricate carved archway at entrance intricate, fountains, waterfalls highly detailed, digital painting, artstation, concept art, sharp focus, cinematic lighting, pencil illustration by Roberto Ferri and artgerm and alphonse mucha detailed matte painting, deep color, fantastical, intricate detail, splash screen, complementary colors, fantasy concept art, 8k resolution trending on Artstation Unreal Engine 5 golden hour | Anything