Cao Dai Temple
Cao Dai is a strange mix of religions. But for visitors, its about the buildings.
The colors were described by a tourist as 'a rude assault to the eyeballs'. Cao Dai

Some tunnels used during Vietnam, and French War, surface nearby.

The Cu Chi tunnel system is now a major tourist attraction and theme park?
"Please try to be a Cu Chi guerrilla. Wear these uniforms before entering tunnel."
is the sign which greets tunnel tours. Black pajamas, pith helmets, and old
rifles are available. At tours end, you can fire AK-47s, bullets are $1.

Disclaimer: The Cao Dai topic is vast and I can not fully explain the war
connections good or bad in this space. Please read on your own about it.