Pearl Spring Scenic Area sits in Pukou, across the Yangtze from central Nanjing, and offers a softer day out than the city's dense historic core. Springs, lake paths, wooded hills, and leisure facilities make it more of a local escape than a must-see monument.
It earns its place if you have already covered Purple Mountain, the city walls, and the main museums, or if you are staying on the north bank. Treat it as a spacious park day rather than a quick central sightseeing stop.