Bottomless Lake is another Ainigmata Ostraka puzzle found in Assassin’s Creed Odyssey.
The Bottomless Lake Ainigmata Ostraka stone tablet can be found in Mellisani Cave, you’ll likely visit this location during one of the early side missions.
Bottomless Lake solution and location
The cryptic clue for Bottomless Lake reads:
Taking the plunge? Everyone on the island thinks this is the deepest dive, but there is a lake in the Coast of Koliadai that is rumored to be bottomless. If you are able to dive as far as the woman in marble, you will be able to claim me.
Watch the video below for the location of the reward or read on for the text guide.
The lake you need to head for is Lake Abythos which is in the central part of Coast of Koliadai. If you look at the map you will see the large blue lake area on the map.
Head to the lake and dive in, then swim down to you see a statue of a women under the water, this is the ‘woman in marble’ mentioned in the clue. You will find the reward on her arm.
You will be rewarded with an engraving for solving this Ainigmata Ostraka puzzle.