Hogwarts Legacy Coastal Mine is a dungeon very similar to The Tower Tunnel, meaning that it features two Collection Chests collectibles you may want to find to get 100/% completion in the Marunweem Lake region of the video game published by Warner Bros. Games.
Unlike the collectibles in The Tower Tunnel, The Coastal Mine Collection Chests are far more complicated because they are found in hidden areas that are a bit harder to spot.
Furthermore, one of the Collection Chests in Coastal Mine dungeon requires you to activate a specific device.
To help you find them, our Hogwarts Legacy Coastal Mine Collection Chests locations guide below explains where to find both collectibles inside the dungeon since they count as the 15 Collection Chests in Marunweem Lake.
Where To Find The Coastal Mine In Hogwarts Legacy
Hogwarts Legacy Coastal Mine is found on the northern side of Marunweem Lake, as you can see on our map below.
If you follow the story, you’ll visit this dungeon while playing Lodgok’s Loyalty main quest. The Coastal Mine plays an important role in the story because inside, you’ll get to destroy one of Ranrok’s drills.
Before moving forward, it is worth outlining that even if you miss the Collection Chests inside The Coastal Mine during the first visit, you can return to this dungeon later.
Furthermore, you should know that for the second chest below, you’ll need to activate a device. Or a furnace.
As such, after entering the mine, progress through the dungeon and take the Goblin cart to the next section.
After you arrive, check the first room; then, you’ll need to follow some stairs. On top of them, you’ll find a furnace(pictured below). Make sure you set it on fire by casting Confringo on it.
As mentioned starting the furnace above is a mandatory step for unlocking the second chest, so don’t miss it.
Collection Chest #1: In A Hidden Room
After finding the furnace above, continue following the main path until you reach a large area where you’ll encounter multiple Goblins.
It is the largest hall in the dungeon. When you get there, check the western side for some spiral stairs (pictured below).
Follow the stairs, and they’ll lead you to a ledge you can climb. Go up, climb another ledge, and look for a manhole on the ground. Pull it with Accio, then descend the ladder to a secret room.
The first Coastal Mine Collection Chest will be waiting for you on a crate, and when you open it, you’ll unlock the Medium Ground Surfaces Decoration.
Now exit the room via the round door, and if you need help finding all other Treasure Chests, consider following our Hogwarts Legacy Lodgok’s Loyalty walkthrough.
Collection Chest #2: In A Hidden Section
For the second Coastal Mine Collection Chest, you must progress through the mine and pull the large elevator plate heading south.
After you clear the Goblins in the lower section, you’ll see another elevator cart (pictured below).
Make sure you interact with the cart and take it to the secret section.
When you arrive, you’ll find a locked door. Cast Accio on the hook on the left side but be advised that the door won’t open unless you fire the brazier mentioned above because it needs steam.
Now, open the round iron door, and behind, you’ll find the second Coastal Mine Collection Chest, which unlocks the Giant Purple Toad Statue.
After you find the second Coastal Mine Collection Chest, use the same cart to return to the previous area and continue your quest.
Last but not least, make sure you visit our Hogwarts Legacy Wiki, where we discuss all collectibles locations and puzzles in the game.