Strange Stone Monuments

Whenever I visit Castrelos Park I always find something new to photograph.

Although I had already seen these strange stones from afar, this time I wanted to get closer to appreciate them better.

It is a group of stones erected and placed in a circle, I do not know why they were put there or where they come from, they are enclosed inside some bars but the strange thing is that they have no sign that identifies them.

I didn't find any information on the Web about them either, what I can think of is that they are some kind of fossilized dinosaur hatching eggs, or maybe remains of a meteorite!😁

What do you think?

As you can see in these images below, some of the stones are concave, with some kind of footprints inside and holes.

I'm not really an expert on ancient stones, I just like to take pictures!

If any of you know anything about this stuff, please leave me a comment. ✏️

This is my entry for the #monomad challenge!