Interesting place, not many people are aware of Caodaism and this is where you can actually get to know some details. There are monkeys around the temple too.
What I like the most is that there are no tourists most of the time. You can walk atound by yourself and enjoy local view. It takes about 2 hours to reach it from Lao Cai but rewards in no crowds and beautiful landscape on the way.
One of my favorite ones I’ve been to. Don’t get the crowds here like at Mesa Verde, but the cities are spectacular. Just wish the road to it was better. Very rough drive.