Martin D.
Google
This is such a beautifull historical museum with so many cultural object about former Kingdoms in Thailand, especially the Lanna Kingdom.
It is a little bit expensive (300 baht adult), but holidays costs more so I think it is worth visiting it.
We, 3 people, were the only ones so we got a private tour.
When you visit Chiang Rai, this museum must be on your bucket list!
And afterwards you should drink a perfect cup of Akha coffee, out of the museum left, cross the streets and then 20 mtrs.