Find areas rich with traces and item drops using Ingress Prime.

Niantic is the developer for Ingress, Pokémon Go, and Wizards Unite (CATAN: World Explorers is also in development).

Because they all use Niantic’s Real World Platform, there's going to some similarities in game mechanics

Theres a relationship between XM and Pokémon Go spawns. XM is always found around portals in Ingress. Every POI in Niantic’s Real World Platform is found in Ingress Prime as a portal, and there is always XM around portals. Not all POI are used in Wizards Unite, and even less are used in Pokémon Go. If you've noticed more traces and items near Inns, Greenhouses, and Fortresses, it's because there is more XM at these locations.

XM can be found elsewhere and there are increased trace and item drops. Using Ingress prime, you can find pockets of XM which regularly regenerate.

This is such a location in my neighborhood. http://imgur.com/a/eiFPsLy