Keep each tower tied to its image
Use the recorded location list to select an individual tower. The link carries the stage, view and snapshot, so another person can inspect the same source image. A tower seen in two views is not necessarily two towers.
Use a personal checklist
Open a tower and choose Mark found after visiting it. This changes only your browser checklist. Use Undo if you selected the wrong record. Found status does not tell the site that the source has been verified.
What the record does not establish
A marker alone does not establish an achievement requirement, a reward, or a safe route to a tower. The map shows recorded image positions; confirm the scene and route in your game.
Sources & notes
Available snapshot: export-0f29ea7aaf73a3744fe06a9d. Community data; not independently reviewed.