Not surprisingly, Jolene tells you to place the emerald in the final hole. Go back downstairs and inspect the glowing hole. A keystone will appear on the pedestal in the middle of the room; use it to open the door on the left and enter. Pull out the statue on the right side of the staircase and inspect the hole in the wall to open an adjoining room; inspect the three holes in the floor here for some treasure. Back out and go down the stairs.
On the wall to the left, there’s a hidden door easily spotted by the rows of white brick on either side. Inspect this wall, and in the next room, collect the nectar and inspect the back wall. Inspect the back wall here as well to find an adjoining room with a relic. Back out to the room you were in when you came down the stairs with the electrical traps. There are two narrow staircases near the traps, but only one can be accessed right now, so ascend that one. Push the statue as far as it can to disable the electrical traps below, then pull it forward two spaces onto the other panel. Go back down and up the other staircase. Keep going up the next staircase, and dive through the pool.
When you come out, you’ll be in a small room. Loot it and go up the stairs here. The traps should be disabled, so go up the next set of stairs. Grab the Ancient Coins from the precarious walkway and push the statue so you can access the heart keystone. This will set off some electrical traps in one corner. After grabbing the keystone, pull the statue off the panel and inspect the wall where the traps were to find a hidden door. There’s a long hallway full of treasure here, and behind one of the piles of rubble is a hidden room with more treasure. Loot to your heart’s content and back out to the place where you found the heart keystone; use the keystone to go through the door.
Go down the stairs to find ample amount of treasure, as well as a hole in the wall that opens a shortcut back to the living room area from before; great if you want to take a nap or use the toilet. If you’re ready, head down the next flight of stairs. Don’t be overwhelmed by all of the foot panels here; just step on them as shown in the image below to unlock the door ahead, and go through to the next room.
Stand on the foot panel and you’ll be told to follow the blue spirit. Just keep clicking “go here” in the center of the blue-lit area and follow it through the room. Doing so will eventually reveal a foot panel near the stairs, which disables all of the traps and makes the room safe for further exploration. Go up the stairs and you’ll find yourself back in the room with the mummies; pull the statue near you (the one you couldn’t move before) onto the panel. Avoiding the mummies, head down the stairs that were previously blocked off by fire traps.
Clear the rubble in the small adjoining room and pull the statue to find a hole behind it. Inspect it to open a secret door and go through. Finally, you’re almost done! The glowing tomb in the back corner has the recipe you’re looking for; loot it. Go through the door on the other side of the room, up the stairs, and on the panel for a shortcut out, and report your success. Finally, your mission is complete!
Now that you’re a seasoned traveler in France, go ahead and enjoy the spoils of your adventuring. Buy a vacation home, befriend the locals, and check out the non-underground sights—remember, you’re still on vacation!