Hainan Provincial Museum is one of Haikou's most useful cultural stops, especially for travellers who know the island mainly through beaches and resorts. Its galleries introduce Hainan's archaeology, maritime links, minority cultures, natural environment, and changing place within southern China.
The museum is a good first-day visit because it gives context for later travel around the island. It is also a practical rainy-day option in Haikou, with enough range to interest visitors who want more than a quick old-town walk.