First off apologies for not having pictures. They were on my camera and I don't know what happened to them after I copied them so the review has been pending for ages and now I'll just submit without. Second, ensure you plan this correctly. The opening times for the museum and "Pedra do Ingá" site is ONLY in the mornings. I don't know why but I suppose it's because this area of the country is not visited much overall so they limit their time just to the morning. It's also closed on Mondays but that's not so odd. The strange opening times are a problem if you are staying in Recife like me, or like most people. I will give you three options: a) have a hotel near the site. I didn't find anything suitable and it might be bad for having food options but you'll then have less time to travel for sure. B) Have a hotel at the outskirts northwest of Recife. It will save you a good hour traveling through the horrible town traffic. You can then leave at 8-9 ish and still make the site in time. C) Like me, leaving VERY early. I mean 6am. It will take away all the bad traffic in town and then only require 2 hours of traveling. You'll miss breakfast at your place so plan accordingly. You'll then arrive at the site for the opening time and still have enough time to see Santa Cruz de Itamaracá Fort or even Olinda on the way back.
So you actually made it. There are two parts of the section: the history museum about the stone and the actual stone itself. It's just this stone. There are more sites as far as I remember but this is the best place to see them. I was thrown in with the group that was around so unsure if you have to take a group tour or it just happened to be like that. I think sometimes there's just nobody as the place is quite deserted so I think they just let you visit on your own.
Your main view is a large 2m high petroglyph-covered rock next to a river at least 30 meters long. It's not the most impressive river but it's nice to have something flowing nearby while you are in the middle of nowhere as you admire the rock. You will easily spend your time JUST looking at the rock though but perhaps plan a small break here as you will just be traveling here for the site and back for what's next.
The carvings by the native tribe comes from a long time ago but also has carvings from around 200 years ago. The main themes are fruit, animals, star constellations and figurines. Without the info from the museum you'd have absolutely nothing but as you went there first you'll at least know it's origins. There is no info on why the carvings were created so it's just to look at it and...well, admire? Either way, that was it. I spent half an hour in the museum and maybe 1 hour at the rock which included just sitting at the river to kill time.