Porto Cathedral, grand, intricate stone carvings, ornate Gothic style, imposing Romanesque façade, tall stained glass windows, vibrant colors, dramatic lighting, morning sunlight, misty atmosphere, surrounding medieval streets, narrow alleys, ancient buildings, cobblestone pavement, Baroque-inspired interior, intricately carved wooden pews, high vaulted ceiling, grand organ pipes, warm golden tones, detailed textures, historical landmarks, UNESCO World Heritage Site.