Today has been “Be A Tourist In Your Own Town” day. The passport includes admittance to the local zoo. The local zoo has about a dozen Ingress portals. While you might not pay the normal zoo fee just to capture some imaginary portals (although it looks like some local players have annual passes), for part of a package that costs $1, you might go.
The local Ingress communications channel has been filled with players capturing zoo portals, linking them up, re-taking them from the other team, and generally making an imaginary warzone of the place. The only thing the normal zoo visitors would notice is that a few people are staring at their phones instead of the animals (more than usual) and may be very particular about where they are standing.
Try visiting something like the Ingress intel map and looking at Lake Buena Vista, FL (Disneyworld): theme parks all over Orlando and the surrounding area, with every ride, attraction, and statue marked. Some people are having a very different experience in the Magic Kingdom.