Some nests are scattered around the island, and judging by the interactive map, the ocean included. I wasn't really aware there was a cave system under the island though. I'll revisit the area once I have a chance and will release an update with better spots.

Whether a nest spawns is dependent on the Magmasaurs only. By Wildcard defaults, they find the closest spot in a radius of a kilometer and spawn a nest there and most often if only one nest spawns, it's due to bad spawn distribution which I can't really do anything about.

fair enough, Also fairly sure the Cave I am speaking of is one of the Artifact caves, simply called the "Lava Cave" thing is apart from a small bit just as you go down into it, its mostly just a huge drop into Lava so if stuff did spawn in there you can't get to it I don't think...and regards to the nests I will just sweep the area around the Magmasaurs then, see if I can find any more.

Map for reference: https://alex4401.github.io/ark/cg1/latest/thecenter.html

If the situation looks quite dire, I'll add some custom spawners to the map.

Yeah I already checked the spawn map, its how I found the nest I did find, but again I only found the one, however now I know to check around the Magmasaurs themselves and not just using that map I should find some (I also turned up the number of eggs to 8, on the off chance they spawn under the ground or in walls or something with a higher number spawning the chances of finding one is increased)

Since the Halloween event, the spawn of eggs has decreased.
What about you?

Would you like to spawn if you increase the number?