They are dedicated to the planet Mars.

There's one in Nong Khai that I know of.

Is there a Wat An Khanh near you? Have you got some pics of it or a Google Images link to it?

I'm looking for unique characteristics about temple design/features, ceremonies and monk rituals.

And why it is that there are temples dedicated to Mars in the first place?!

Are there temples dedicated to the other planets or the moon?