The guides linked below will help you find all of the Horizon Zero Dawn Collectible Locations.
You can find the following types of Collectibles in HZD:
- 30 Metal Flowers
- 6 Arnak’s Figures / Banuk Figures
- 12 Ancient Vessels
- 23 Grazer Training Dummies
- 12 Vantage Datapoints
- 4 Cauldron Infos
- 5 Tallnecks
- 5 Power Cells
- 6 Bandit Camps
You can keep track of how many you found via the notebook menu. None of them are missable. You can free roam in the open world to get them any time. Furthermore, you can buy maps in the from merchants to reveal their locations in the game world. You can purchase one map per collectible type and it will show all the locations. They are very cheap and can be bought at most merchants after completing the first few main quests. Climbing tallnecks makes the fog on the world map go away, so that you can see the entire map clearly.
After picking up a collectible you must reach the next checkpoint or create a manual save, otherwise your progress gets lost.