Create a stunning realistic image of an urban cityscape during sunset, highlighting a historical site that overlooks a tranquil river or lake. The sky is clear, painted with shades of orange, pink, and purple as the sun dips below the horizon. In the foreground, people of various ages and backgrounds are engaged in leisurely activities—some are walking their dogs, while others are enjoying a picnic by the water. The historical architecture is beautifully lit, casting long shadows and adding depth to the scene. The overall mood is bright and cheerful, inviting viewers to feel the warmth of the sunset and the joy of urban life.