Nanjing Geological Museum is a specialist museum for rocks, minerals, fossils, and earth science, reflecting the city's role in Chinese scientific education. It is a quieter alternative to Nanjing's major history museums, but the collections can be surprisingly rich if geology interests you.
Families and science-minded travellers will get the most from it. Use it as a focused indoor stop rather than a must-see for every visitor, and pair it with nearby cultural sights if you are already moving through the eastern side of the city.