Private Giveaway: Lara Croft and the Guardian of Light

I know, it sounds crazy, but let me explain.

To my knowledge, there is an ancient artifact hidden somewhere around Central America. It is doubtlessly valuable and I know that more than of you would like it for themselves.
I have no problem with that. I am not in the mood for adventures - but you are, I can see it! So here it is: This is all I know about the location of this ancient artifact. It is a photograph of an ancient aztec tablet. See if you can make sense of it.

There were five pictures all in all, but two were destroyed during the dig. Here's what we have.

The first picture seems to be the Central American coastline. Below it we see a bar and 4 dots.

The second one is destroyed beyond recognition - a shame really, and a great loss. The lab guys did futz around with some of their equipment and informed me that they think it was the lost symbol for "b".

The third one is a picture of a dead man in armor. Below it there is a single dot.

The fourth one.... man, that gives me the shivers just looking at it. It's a picture of a dreadful being and I think in the background that's Venus rising. Below this one there are three bars and three dots.

The last one, yet again, tragically destroyed, but it seems to be a mirrored version of the second one.

EDIT: Maybe it would help you if I told you that we found this plate within the sacrificial room of an ancient temple? Not a temple to a certain deity, mind you - they were worshipping pretty much whatever in there.

EDIT 2: After shouting algorithms around the lab and just stopping short of throwing their own feces the computer guys gave me this. Maybe that thing can help.

Well. That's all we have. Try to find it before the week is over - I need this tablet back by the weekend. Good luck!

What? Of course you may work together. Do as you please, but remember that there's only one artifact to be found.