Hogwarts Legacy Coastal Cavern Field Guide Page collectible is required if you aim for 100% completion in the smallest region of the video game published by Warner Bros Games. Like most Field Guide Pages in Hogwarts Legacy, the one in Coastal Cavern is invisible, making it harder to find.
However, if you get close to the Page, its icon will appear on your map, and you can track it. But you’ll need to use Revelio (Left Arrow on the D-pad of your PlayStation/Xbox controller) to make the collectible visible so you can obtain it.
Where To Find the Coastal Cavern Field Page in Hogwarts Legacy
As you can see on the following Coastal Cavern map, the Field Guide Page is located in the eastern part of the small region.
The quickest way to reach the Coastal Cavern is to fast-travel to the North Poidsear Coast Floo Flame. There is a chance that you haven’t unlocked the Floo Flame yet, meaning you have to cross the Coastal Cavern area all the way to the Poidsear Coast. The entrance to the huge cavern can be hard to find.
Look for it in the Medium Bandit Camp in the southeastern part of the South Sea Bog region. Once you’ve found the entrance, you’ll have no problems crossing it because it’s linear. The Field Guide Page collectible is near the North Poidsear Coast Floo Flame, next to the broken railing, as shown in the next image.
You would think this is a Poidsear Coast collectible, but don’t worry; it will count for the Coastal Cavern area. Now go next to the spot where the railing is broken and cast Revelio to make the collectible visible. Upon picking up the Field Guide Page, you’ll find out more details about it, like that it’s named Antique Compass.
It’s worth mentioning that not far to the southeast of the Field Guide Page, you can find the Coastal Cavern Balloons.