Exploration in areas of Genshin Impact typically shows some symbols on the map, which indicate an item that can be collected for certain rewards. For instance, in the main areas of the regions, there are Anemoculus, Geoculus, Electroculus, and so on. But the sub-regions like Dragonspine, Enkanomiya, the Chasm, and Chenyu Vale, have their own versions of Oculi.