TourBuilder is not designed for uploading POIs (still photos). TourBuilder only recognizes 360 imagery.
We recommend uploading the POIs directly to the client’s Places page. To do that, please follow these steps:
1) Locate Places page on Google Maps
2) Click on the 'Maps' tab above the results
3) Underneath the business description and filmstrip with POIs or panos, locate and click on the 'Add a photo' and follow on-screen instructions.