Warning: This post will only be exciting to geology students.
We took a boat ride around the Dingle peninsula to see puffins, Blasket Island, and the hang out Francois Mitterand's vacation home with his mistress (but that's a whole other story).
As we were going out, our guide pointed out this rock structure - the clear gray section towards the center right that looks like someone did a really bad plaster job or it looks like dried mud.
Turns out this section is over 200 million years old, and geologists basically come from all over the World to see this rock. Something to due with the fact that it came from deep under the Earth and that delicate structure actually survived - usually specimens are much smaller.
Told you only the amateur geologists would find that interesting.