Unlocking the Serpent’s Chest in Sukhothai requires three serpent keys, which are hidden across the Vatican, Gizeh, and Shanghai. While the journey is full of puzzles and challenges, this guide will walk you through every step to ensure you don’t miss a thing.
Preparation is Key: Get the Rebreather! Before embarking on this quest, make sure you purchase the rebreather in Sukhothai. This essential tool allows you to breathe underwater and is crucial for accessing two of the keys. If you’re low on funds, cracking open the Indiana Jones and the Great Circle A Game of Wits safe can provide the cash you need. Once you’re equipped, you can revisit the necessary locations through the “Travels” tab in Indy’s journal.
Serpent’s Chest Keys – How to find them all
Finding the Vatican Serpent Key

The Vatican key is the trickiest to locate, partly because the map marker is misleading. Instead of leading you directly to the key, it points above the actual location. To find it, you’ll need to navigate to a hidden area in the Sacred Wounds excavation site. Here’s how:
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Return to the Bulldozer Excavation Site: This is where the bulldozer crashed through the roof at the end of the Sacred Wounds puzzle. Drop back into the hole you originally exited through.
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Locate the Chandelier Room: Follow the map marker until you find a chamber with a chandelier you can whip-swing across.
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Find the Leaning Pillar: Instead of heading to the marker, look for a leaning pillar nearby. From the elevated path, you’ll spot a small alcove below.
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Jump to the Hidden Alcove: Drop down and look for a small hole in the wall. Crawl through to discover a new area.
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Retrieve the Key: In this hidden zone, you’ll find the Ancient Vatican Key at the base of a broken giant urn.
Finding the Gizeh Serpent Key

The Gizeh key is tucked away in the Khentkawes I Dig site, where you previously activated a lift for the Secret of the Queen Mother objective. Here’s the path to the key:
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Return to the Dig Site: Head to the chamber marked on your map.
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Dive into the Passageway: Swim towards the arrow indicating a submerged passage leading to a hidden underwater chamber.
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Move the Timber Beam: Use the rebreather to stay underwater and clear the beam blocking your path.
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Claim the Key: In the newly revealed area, you’ll find the Gizeh Serpent Key resting on a small patch of sand.
Finding the Shanghai Serpent Key

The Shanghai key is the easiest to collect, located in a canal section of the city. Follow these steps:
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Locate the Canal: Use your map to find the highlighted location in Shanghai.
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Reach the Marked Point: Once there, the key will be straightforward to access.
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Pick Up the Key: Simply grab it from its designated spot, with no extra puzzles or challenges involved.
Video Guide – Serpent Key Locations
Your Reward
After collecting all three serpent keys, return to the Serpent’s Chest in Sukhothai. The chest is located in a small side tent near Voss’s main camp tent. Use the keys to unlock it and claim your rewards:
- 180 Adventure Points for each key.
- 250 Adventure Points for opening the chest.
Your grand total of 430 Adventure Points might feel underwhelming after all the effort, but at least you’ve conquered one of Indiana Jones’ trickiest mysteries!