Getting to Safehouse in Blue Prince is one of the hidden secrets of My. Holly and here is how you can access the mysterious area.

The secrets of Blue Prince don’t end once you reach your primary goal, Room 46. In fact, the mysterious Mt. Holly holds numerous secrets beyond the endgame. One such secret is the Safehouse, a hidden place filled with lore details and clues for other puzzles. It also contains one of the valuable end-game items. The Safehouse can only be accessed from the Underground Reservoir area using the boat. Find out how you can access the Safehouse in Blue Prince and what secrets the area holds.
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How To Reach the Safehouse in Blue Prince
You can find the hint about the Safehouse area in a secret nook located past the Underground red door. It is the same area where you find the Underpass Mora Jai puzzle box. A sketch on the mirror provides intel about the water levels of the reservoir: Dock Level (13), Entry Level (6), and Full Drain (0). Follow these steps to access the Safehouse:
- Draft a Pump Room and lower the Reservoir water level to 13 or Dock Level. This allows you to ride the boat from the Foundation side to the Fountain side or vice versa.
- Make sure to leave the boat at the Foundation side, where you will find the descending stairs.
- Head back to the Pump room and drain the Reservoir water to 6 or Entry Level this time.
- Return to the Underground Reservoir and descend the stairs at the Foundation side to access the boat.
- Interact with the boat to ride it through the Entry Level tunnel hole, which takes you directly to the Safehouse.
What’s Inside Safehouse in Blue Prince?

After reaching the white shore, exit the boat and proceed forward to reach the Safehouse. You will find various clues for other puzzles inside the Safehouse, such as the Surveillance puzzle and the Castle Cipher puzzle. You will also find a Train Metro map at the Safehouse, which you will need to solve the A New Clue puzzle.
In addition to all the clues, you can also find a Sanctum key at the Safehouse, which unlocks one of the eight doors at the Inner Sanctum. While you can technically access the Safehouse early in the game, the Sanctum key and the associated Sanctum Sigil puzzles are part of the late-game content.
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