Illustrate an isometric view of a serene urban park nestled within a city, shrouded in a gentle fog. The park should feature winding paths, benches, and lush greenery, all rendered in a clean, modern isometric style. The fog should create a dreamy atmosphere, softening the edges of the park's features and blending the vibrant colors of flowers and trees into muted tones. In the background, the outlines of city buildings should emerge from the fog, providing context and depth to the scene. The lighting should be soft and diffused, mimicking early morning light filtering through the mist, enhancing the tranquil mood. Include subtle details like a couple of silhouettes enjoying a stroll or a dog playing, adding life to the serene environment while maintaining the overall peacefulness of the illustration.