It's typically a pillar or other visible structure on the surface, or in the center of one of those hill dungeons. I've never seen one by itself, but if you don't see anything obvious on the surface, hit the very center of the eerie area and start digging. It's not chunk-based, it's radius around the node, so you should know its exact NSEW position by standing in the center.Sky colour doesnt seem to change, but biome says eerie. Thanks!
So the wiki says i could simply punch it to destroy the node. Am I supposed to see it at the top or will I need to dig?